Advancing the Future of Energy

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Advancing the Future of Energy
Advancing the                                                                                                      Basics of Refining and
   Future of Energy                                                                                                       Renewable Diesel
   WITH CAPITAL DISCIPLINE, INNOVATION
   AND UNMATCHED EXECUTION

   RELIABLE            AFFORDABL E                SUSTAINABLE ENERGY

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1
Advancing the Future of Energy
Gary Simmons
  Executive Vice President
  Chief Commercial Officer                 .

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1   2
Advancing the Future of Energy
Agenda

                                                          1              Crude Oil Overview

                                                          2              Refining Basics

                                                          3              Refinery Optimization and Economics

                                                          4              Renewable Diesel Basics

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1   3
Advancing the Future of Energy
Crude Oil Characteristics

• Crude oils are blends of hydrocarbon molecules
         o   Classified and priced by density, sulfur content and acidity                                             Heavy, sour,
• Density is commonly measured in API gravity                                                                         high acid
  (relative density of crude oil to water)                                                                            crude oils are
         o   API > 10: lighter, floats on water                                                                       more difficult
         o   API < 10: heavier, sinks in water                                                                        to process, but
                                                                                                                      trade at a
• Sulfur content is measured in weight percent                                                                        discount
         o   Less than 0.7% sulfur content = sweet                                                                    relative to
         o   Greater than 0.7% sulfur content = sour                                                                  light, sweet,
• Acidity is measured by Total Acid Number (TAN)                                                                      low acid
         o   High acid crudes are those with TAN greater than 0.7                                                     crudes oils
         o   Acidic crudes are corrosive to refinery equipment and require
             greater investment to process significant volumes

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                 4
Advancing the Future of Energy
Crude Oil Reserves and Quality

1.73 Trillion Barrels of Oil Reserves (2019)                                            Sour                                               Crude Oil Quality
                                                                                                                                                                                                 Majority of
                                                                                                            4.0
                             Asia Pacific 3%                                                                                                     Maya                                            global
                                                                                                                              Cold Lake
                             Africa       Canada          U.S. 4%                                                                               WCS                                              reserves are
                                                                                                                                                          Basrah
                              7%           10%                                                              3.0                                                                                  sour crude oils
                                                                                                                                                              Arab

                                                                                              Sulfur, wt%
                                                                                                                      2.51
                                                                                                                       M100           Napo                   Medium
                                                   South &                                                                                                    Southern Green
                                                   Central
                                                                                                            2.0           Castilla
                                                 America 19%
                Middle East 48%                                                                                                              Mars                    Arab Light
                                                                                                                                   Oriente                     WTS                               WTI and Brent
                                                                Europe 1%                                   1.0                                              ANS     Bakken    WTI               are the
                                                          Russia / FSU 8%                                                          Dalia                           LLS        Midland            primary light
                                                                                                                                                    Brent
                                                                                                                                                Eagle Ford                        WTI Light      sweet crude
                                                                                       Sweet
                                                                                                            0.0
                                                                                                                  0           10           20       30          40         50          60
                                                                                                                                                                                                 oil pricing
                                                                                                                                                API Gravity                                      benchmarks
                                                                                                    Heavy                                                                           Light

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                       Source: Valero and industry reports.                 5
Advancing the Future of Energy
What is in a Barrel of Crude Oil?
      Crude Oil Types                               Characteristics                            Inherent Yields
                                                                                                           3%          2019 U.S. Refinery
                                               • > 34 API Gravity                                                         Production                                 Refineries
           Light Sweet                                                                                    32%
                                               • < 0.7 % Sulfur                                                                                                      upgrade
           (WTI, LLS, Brent)                                                                              30%                   Propane/
                                               • Most Expensive
                                                                                                                      7%
                                                                                                                       8%   Refinery Gases
                                                                                                                                Butane                               crude oil into
                                                                                                          35%
                                                                                                                            Gasoline
                                                                                                                                                                     higher value
                                                                                                                            RBOB                                     gasoline and
                                                                                                                            CBOB
                                                                                                                      45%   Conventional                             distillates
                                                                                                          2%
                                                                                                                            CARB
                                               • 24 to 34 API Gravity                                     24%               Premium
           Medium Sour
           (Mars, Arab Medium)                 • > 0.7 % Sulfur                                           26%

                                               • Less Expensive                                           48%               Distillate
                                                                                                                            Jet Fuel
                                                                                                                      38%   Diesel
                                                                                                                            Heating Oil
                                                                                                          1%
                                               • < 24 API Gravity                                         15%
           Heavy Sour                                                                                     21%               Fuel Oil &
                                               • > 0.7 % Sulfur                                                       10%   Other
           (Maya, WCS)
                                               • Least Expensive                                          63%

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1     Source: Energy Information Administration.                    6
Advancing the Future of Energy
Basic Refining Concept
                                                                                                                 Intermediates                         Final Products
                                                                                                     C1 - C4
                                                                                                                                      Light Ends          Fuel Gas
                                                                                                                                      Recovery &          Propane
                                                                                                                    Natural Gas       Treatment            NGLs
                                                                                        < 90°F                       Propane
                                                                                                                      Butane
                            Crude Distillation
                                                                                         90–         C5 - C8                         Isomerization /
                                  Unit                                                   220°F                                          Blending
                                                                                                                                                          Gasoline

                                                                 Distillation Tower
                                                                                                                   Light Naphtha
                                 (Atmospheric)
                                                                                                     C8 - C12                          Reformer /         Gasoline
                                                                                        220–
                                                                                        315°F                     Heavy Naphtha         Blending       Petrochemicals

                                                                                                    C12 - C30                                             Kerosene
                                                                                        315–                                          Hydrotreater         Jet fuel
                                                                                        450°F                        Kerosene                               Diesel

                                               Furnace                                             C30 - C50+                        Hydrotreater /       Gasoline
                                                                                         450–
                                                                                                                      Diesel /       Hydrocracker          Diesel
                                                                                         650°F
                        Crude                                                                                       Light Gasoil
                         Oil

                                                                                                   C30 - C50+                           FCC /             Gasoline
                                                                                       Vacuum                                        Hydrocracker          Diesel
                                                                                                   650 - 800°F     Heavy Gasoil
                                                                                      Distillation
                                                                                         Unit      C50 - C100+                       Coker / Resid        Gasoline
                                                                                                                                     Hydrocracker          Diesel
                                                                                                     +800°F      Residual Fuel Oil                         Coke
                                                                                                                    / Asphalt
I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                                     7
Advancing the Future of Energy
Low Conversion: Hydroskimming (Topping)
                                                      LPG
                                                                                                                          Fuel Gas
                                                                                                                      4% Propane
                                                                                                                       8% Butane            Low
                                                                                                                                            complexity
                  Distillation Tower

                                                                                                                          Gasoline
                                                      Naphtha
                                                                                                                          RBOB              refineries
                                                                                                    Gasoline          32% CBOB
                                                                            Reformer
                                                                                                                          Conventional
                                                                                                                                            process sweet
                                                                                                                          CARB              crude oils
                                                                                                                          Premium
                                                                                     Hydrogen

                                                      Kerosene                                      ULSK / Jet Fuel       Distillate
                                                                           Distillate                                 32% ULSK / Jet Fuel
 Light, Sweet                                         Diesel              Hydrotreater              ULSD                  ULSD
    Crude                                                                                                                 Heating Oil

                                                      Vacuum Gasoil                                                       VGO
                                        Vacuum                                                                        32% Fuel Oil
                                       Distillation   Resid                                                               Asphalt
                                          Unit                                                                            & Other

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                     8
Advancing the Future of Energy
Medium Conversion: Catalytic Cracking
                                                     LPG                                                                        Fuel Gas
                                                                                                                          8%    Propane
                                                                                                                                Butane
                                                                                                                                               Moderate
                                                                                                                                               complexity
                 Distillation Tower

                                                     Naphtha                                            Reformate               Gasoline
                                                                                    Reformer                                    RBOB
                                                                                                                          43%   CBOB
                                                                                                                                               refineries tend
                                                                                                                                Conventional   to run more
                                                                                                                                CARB
                                                                                          Hydrogen                              Premium        sour crudes,

   Light-
                                                     Kerosene
                                                                                                                  ~~
                                                                                                       ULSK / Jet Fuel          Distillate
                                                                                                                                               yield more
                                                                                                                                               high value
  Medium,
                                                                                    Distillate                                  ULSK           products and
                                                                                                                          30%   Jet Fuel
 Sour Crude
                                                     Diesel                        Hydrotreater        ULSD                     ULSD           achieve higher
                                                                           LCO
                                                                                                          Alkylate
                                                                                                                     ~~         Heating Oil
                                                                                                                                               volume gain
                                                                                          Alkylation
                                                                 Fluid Catalytic             Unit
                                                     Gasoil                                                FCC Gasoline
                                                                 Cracker (FCC)
                                       Vacuum
                                      Distillation                                   Slurry
                                                     Resid / Asphalt                                                            Fuel Oil
                                         Unit
                                                                                                                          19%   Asphalt
                                                                                                                                & Other
I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                          9
Advancing the Future of Energy
Québec FCC unit.

Fluid Catalytic Cracker (FCC)

                                                                                      Fluid Catalytic Cracker Yields
                                                                                                                                               Refinery Gases
                                                                                                                                                 Butylene                   FCC converts

                                                                                                                                Fractionator
                                                                                                                                                (Alky Feed)                 low-value
                                                                                                                                                 Gasoline                   gasoils into
                                                                                                                                                                            higher value

                                                                                     Reactor
                                                                                                                                               Light Cycle Oil
                                                                                                                                                 (Distillate)               light products
                                                                                                   Spent
                                                                                                  Catalyst

                                                                                                                  Regenerator
                                                                                                                                                   Slurry

                                                                             Gasoil            Regenerated
                                                                                                 Catalyst
                                                                                                                                         Total FCC liquid volume yield is
                                                                                                                                         approximately 110% of throughput
                                                                                                                  Air

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                                                          10
High Complexity: Coking / Resid Destruction
                                        LPG                    Hydrogen           Hydrogen                                        Fuel Gas
                                                                                                        Hydrocracker              Propane
                                                                 Plant           Propane / Butane                           6%    Butane
                                                                                                                                                 High
                                        Naphtha                                  Reformate                                        Gasoline
                                                               Reformer
                                                                                                                                  RBOB           complexity

                                        Kerosene
                                                         Hydrogen
                                                                                             ~
                                                                                  ULSK / Jet Fuel
                                                                                                                            47%   CBOB
                                                                                                                                  Conventional
                                                                                                                                  CARB
                                                                                                                                                 refineries can
                                                                                                                                                 run heavier,
                                        Diesel

                                              Hydrogen
                                                               Distillate
                                                             Hydrotreater
                                                                                 ULSD

                                                                                             ~                    ~~              Premium

                                                                                                                                  Distillate
                                                                                                                                                 more sour
                                                                                                                                                 crudes oils
                                                                                    Gasoline
   Medium –                             Light Gasoil          Hydrocracker
                                                                                    ULSD / ULSK / Jet Fuel
                                                                                                                                  Jet Fuel
                                                                                                                                                 while
     Heavy,
   Sour Crude                                                LCO
                                                                 (HCU)

                                                                                                Alkylation
                                                                                                                      ~~    33%   ULSK
                                                                                                                                  ULSD
                                                                                                                                  Heating Oil
                                                                                                                                                 achieving the
                                                                                                                                                 highest light
                                                                                Butylene
                                                                                                   Unit
                                                            Fluid Catalytic
                                                            Cracker (FCC) Gasoline
                                                                                                                 Alkylate                        product yields
                                                                                Slurry                                                           and volume
                                       Gasoil                           Coker Gasoil                                                             gain
                                                                                Naphtha             Reformer
                         Vacuum
                        Distillation Resid                      Delayed         Diesel
                                                                                                 Distillate Hydrotreater          Heavy
                           Unit                                  Coker          Coke                                        14%   Fuel Oil
                                                                                                                                  & Other

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                          11
Port Arthur Hydrocracker Unit.

Hydrocracker Unit (HCU)

                                                                                                 Hydrocracker Yields
                                                                                                                                                             Upgrades high
                                                                                                                                                             sulfur gasoil
                                                                                                                                                             into low sulfur
                                                                                                                                       Refinery Gases
                                                                                                                                                             gasoline, jet
                                                                          Hydrogen                                                                           and diesel

                                                                                                                        Fractionator
                                                                                                    Reactor
                                                                                                                                          Gasoline
                                                                             Gasoil                                                                          Increases
                                                                                                                                          Distillate         volumetric
                                                                                                                                       Unconverted Oil       yield of
                                                                                                                                       Unconverted Oil
                                                                                                                                                             products
                                                                                                                                                             through
                                                                                                                                                             hydrogen
                                                                                                               Total Hydrocracker liquid volume yield
                                                                                                               is approximately 110% to 115% of throughput
                                                                                                                                                             saturation

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                                                   12
Port Arthur Delayed Coker Unit

Delayed Coker
                                                                                                            Coker Yields

                                                                                                                                                                              Upgrades low
                                                                                                                                                                              value residual
                                                                                                                                                             Refinery Gases   fuel oil into

                                                                                                                                              Fractionator
                                                                                                         Coke Drum

                                                                                                                      Coke Drum
                                                                                                                                                               Gasoline       higher value
                                                                                                                                                                              light products
                                                                                                                                                               Distillate

                                                                                                                                                                 Gasoil

                                                                                                                                                                 Coke
                                                                     Fuel Oil
                                                                     (Resid)
                                                                                                                                  Total Coker unit liquid volume yield
                                                                                             Furnace                              is approximately 80% of throughput.

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                                                                    13
Greg Bram
  Vice President
  Supply Chain Optimization                  .

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1   14
Maximizing Refinery Profit
Linear Programming (LP) Model

                                                                                                                                       Relationship
                                                                                                                                       between
                Feedstocks (100+)                                                                                     Products (30+)   variables are
                                                                                                                                       modeled in a
            • Prices                                                                                             • Prices              series of linear
                                                                                Refinery                                               equations
            • Qualities                                                                                          • Specifications
            • Availability                                                                                       • Market demand       Linear program
              (purchase volumes)                                                                                   (sales volumes)     is used to find
                                                                                                                                       combination of
                                                                                                                                       feed slate,
                                                                                                                                       products, unit
                                                     •    10 to 25+ individual process units                                           operating rates,
                                                     •    Unit hardware constraints                                                    and operating
                                                     •    Operating parameters                                                         parameters that
                                                                                                                                       delivers highest
                                                     •    Operating costs                                                              profit
I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                       15
Linear Program (LP) Example: What’s for Breakfast?

                                                                                                                                                     Your goal is to
                                                                                                                                                     consume at
                                                                                                                                                     least 18 grams
                                                                                                                                                     of protein, but
         1 LARGE BAGEL                                                       2 LARGE EGGS                                           3 BACON SLICES   not more than
                  $2.00                                                              $3.50                                               $4.00       10 grams of
               3 g protein                                                        6 g protein                                         8 g protein    total fat for
                 1 g fat                                                            5 g fat                                             8 g fat      the lowest
                                                                                                                                                     price

                                          1 CUP OATMEAL                                                   1 CUP ORANGE JUICE
                                                    $2.50                                                                $2.50
                                                 4 g protein                                                          2 g protein
                                                   1 g fat                                                              0 g fat

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                               16
Optimizing Breakfast from an Engineer’s Point of View
  Solve for number of servings of each item:
   Consume at least 18 grams of protein                                                                                                         Even with only
                                                                                                                                                five food
                                                                                                                                    18 grams
                      3g                             4g                            6g                            8g     2g      ≥    protein    choices, there
                                                                                                                                                are so many
                                                                                                                                                possible
   Consume no more than 10 grams of total fat                                                                                                   combinations
                                                                                                                                    10 grams    that using trial
                      1g                             1g                           5g                              8g     0g     ≤   total fat   and error to
                                                                                                                                                find the one
   Minimize the cost of breakfast
                                                                                                                                                with the
                                                                                                                                                lowest cost is
                      $2.00                         $2.50                          $3.50                        $4.00   $2.50   =   Minimum     not efficient

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                           17
What’s the Optimal Breakfast?
                                                 Servings                   Unit Cost                    Protein (g)        Total Fat (g)
                                                         0                                                                                  Linear
                                                                                                                                            programming is
                                                       2.7                   $2.50 = $6.75                     4 = 10.8         1 = 2.7     a branch of
                                                                                                                                            applied
                                                         0                                                                                  mathematics
                                                                                                                                            concerned with
                                                       0.9                   $4.00 = $3.60                        8 = 7.2       8 = 7.2     problems of
                                                                                                                                            constrained
                                                                                                                                            optimization
                                                         0
                                                                                                           Meal
                                                                                 $10.35                         18 g           10 g
                                                                                                                                            Price and
                                                                              GOAL = Lowest                  Min protein       Max fat
                                                                                                                                            “quality” of
                                                                                                                                            each variable
                                                                                                                                            drives the
                                                                                                                                            optimum
                                                                                                                                            solution

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                         18
Crude Oil Break Even Values
                                  Crude Product Yields and Prices (High and Low Crude Prices)
                                           Light Sweet(1)          Medium Sour(2)             Heavy Sour(2)           Light Sweet         Light Sweet
                                                                                                                      @ $99/bbl           @ $51/bbl     Break Even Value
              Products                          Yields                   Yields                    Yields                Prices              Prices     (BEV) = Alternate
              Refinery gases                      3%                       2%                       1%                    $49                $31        Crude Total
              Gasoline(3)                        32%                      24%                       15%                   $108               $60        Product Value –
              Distillate(4)                      30%                      26%                       21%                   $117               $69
                                                                                                                                                        Reference Crude
                                                                                                                                                        Total Product
              Heavy fuel oil(5)                  35%                      48%                       63%                   $79                $41        Value
              (1) Reference crude.
              (2) Alternate   crudes.
              (3) Gasoline crack: $9/bbl.
              (4) Distillate crack: $18/bbl.
                                                                                                                                                        BEV for alternate
              (5) Heavy fuel oil: 80% of reference crude value.
                                                                                                                                                        crude as a
                                         Crude Break Even Values (High and Low Crude Prices)                                                            percentage of
                                                    Light Sweet            Light Sweet @                      BEV                          BEV          reference crude
                                                    @ $99/bbl                 $51/bbl                    @ $99/bbl                    @ $51/bbl         value is relatively
              Crude                                     BEV                      BEV                   % of Light Sweet             % of Light Sweet    insensitive to flat
              Medium sour                                -$3.55                 -$2.58                         96%                       95%            price
                                                                                                                                                        environment
              Heavy sour                                 -$7.76                 -$5.65                         92%                       89%

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                                       19
Crude Oil Differentials Versus ICE Brent
                                  5%
                      Premium

                                  0%

                                  -5%

                                 -10%
                      Discount

                                 -15%

                                 -20%

                                                    Maya (heavy sour)                    ASCI (medium sour)                  WTI (light sweet)               LLS (light sweet)

                                 -25%
                                     2008       2009        2010        2011        2012        2013        2014      2015       2016        2017       2018       2019        2020

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1          Source: Argus. ASCI represents Argus Sour Crude Index.   20
Martin Parrish
  Senior Vice President
  Alternative Energy and Project Development

I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1   21
Global Low-carbon Fuel Policies Driving Demand
   Growth for Renewable Diesel
                                                                                                                                                                                  California Renewable
                                                                                                                                                                                  Diesel Consumption
                                                                                                                                                                                             (million gallons)             618
  Active Low-carbon
  Mandates

  Carbon Mandates                                                                                                                                                              113
  in Development or
  GHG Emissions Goal

                                                                                                                                                                                2014
                                                                                                                                                                                          2015
                                                                                                                                                                                                   2016
                                                                                                                                                                                                           2017
                                                                                                                                                                                                                   2018
                                                                                                                                                                                                                            2019
                          2030 GHG Emissions                 Net-Zero GHG                  Primary Transportation Fuel
                                                                                                                                     2030 Liquid Fuels Goal
                           Reduction Target                 Emissions Target                   Policy Mechanism

                                                                                            Low Carbon Fuel Standard      Reduce the carbon intensity of transportation
  California                     40%                        Net-zero by 2045                                                                                                           LCFS Credit Price
                                                                                                     (LCFS)                           fuels by at least 20%
                                                                                                                                                                              (monthly average, $ per metric ton)
                                                                                  Clean Fuel Standard (CFS) –  Reduce the carbon intensity of transportation
   Canada                         30%                  Net-zero by 2050
                                                                                  enforcement expected 2022                     fuels by 10-12%                           $200
                                                                                 Renewable Energy Directive II
     EU                           40%                  Net-zero by 2050                                         Replace 14% of transport fuels with biofuels
                                                                                           (RED II)
                      •   Oregon is matching California’s GHG reduction target and has an LCFS policy in place                                                            $100
Other Policies        •   British Columbia and Ontario have existing low-carbon fuels policies
  in Place            •   Sweden is implementing a 21% GHG reduction mandate for diesel by 2020 and aims for 50% of transport fuels to be biofuels by 2030
                      •   Finland aims for 30% of transport fuels to be biofuels by 2030                                                                                     $0
                      •

                                                                                                                                                                                   2014
                                                                                                                                                                                            2015
                                                                                                                                                                                                    2016
                                                                                                                                                                                                           2017
                                                                                                                                                                                                                  2018
                                                                                                                                                                                                                          2019
                                                                                                                                                                                                                                   2020
                          State of Washington continues to debate an LCFS with a 20% GHG reduction target by 2035
  Potential
                      •   New York introduced legislation that would require net-zero emissions by 2050 with the possibility of LCFS legislation
   Policies
                      •   Certain Midwest states and Colorado are exploring similar renewables mandates                                                                   Source: California Air Resources Board. LCFS credit
                                                                                                                                                                          price through December 2020.

    I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                                                                                   22
Renewable Diesel Driving Low Carbon Results in California

                          California LCFS Performance                                                                     LCFS Credit by Fuel Type
                              (% reduction in carbon intensity)                                                                           (2020 YTD)
                                                                                                                                                                                                    Cost-effective
 0%                                                                                                                                                         Other
                                                                                                                                                             1%
                                                                                                                                                                                                    fuel that can be
                                                                                                                                                                                                    used with
                                                                                                                                 Biomethane                                                         existing vehicles
                                                  -6%                                                                                9%
-5%
                                                                                                                        Electricity
                                                                                                                        (other) 7%                               Renewable
                                                                                                                                                                   Diesel                           Does not
                                                                                                                                                                    31%
-10%                                                                                                                    Electricity                                                                 require
                  Historic Compliance Targets                                                                       (on-road charging)                                                              infrastructure
                                                                                                                           13%
                  Reported % CI Reduction
                                                                                                                                                                                                    investments
-15%              Future Compliance Targets
                                                                                                                        Biodiesel
                                                                                                                          14%
                                                                                                                                                                                                    Over 2 billion
                                                                                                        -20%
                                                                                                                                                           Ethanol                                  gallons
                                                                                                                                                             24%
-20%                                                                                                                                                                                                consumed since
       2012      2014       2016      2018       2020       2022      2024       2026       2028      2030                                                                                          2011

  I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1               Source: California Air Resources Board. 2020 through June 30.                    23
Diamond Green Diesel (DGD) Feedstock and Margin Indicator
         DGD Feedstock Carbon Intensity and Product Value                                                                  DGD Margin Indicator
                                                                                                                                   $ per gallon
                                                                                                             New York Ultra Low Sulfur Diesel (ULSD) price ($ per gallon)          DGD is designed
                                                                      LCFS credit value ($ per gallon)       + 1.7 * Renewable Identification Number (D4 RIN, $ per RIN)           to process low
     $1.89                                                                                                   + 0.007 * Low Carbon Fuel Standard (LCFS) credit ($ per metric ton)
                        $1.70                                         Carbon Intensity (g CO2e / MJ)         - 8.5 * Chicago Soybean Oil price ($ per pound)                       carbon
                                          $1.58
                                                                                                                                                                                   feedstocks for
                                                                                                                                                                                   higher product
                                                             $1.01
                                                                                                    100
                                                                                                                                                                                   value
                                                                                  82

                                                               54

                                             32
                          27
       20

   Used               Distillers         Animal            Soybean              Grid              Diesel     NYMEX       D4 RIN         LCFS      Feedstock    Renewable
 Cooking Oil          Corn Oil            Fats               Oil             Electricity                      ULSD                                            Diesel Margin

Source: California Low Carbon Fuel Standard (LCFS) 2020 values, assuming $200 per metric ton carbon price.

  I N V E S T O R P R E S E N TAT I O N | B A S I C S O F R E F I N I N G A N D R E N E W A B L E D I E S E L 2 0 2 1                                                                           24
Renewable Diesel Process and Properties
                                                                                    Property                                  Renewable Diesel
                                                                          Physical properties                            Cetane > 70, Sulfur < 2 ppm
                                         Pretreatment                     Cold temperature issues                                 No issues
                                                                                                                                                                     A Pretreatment
                                              Unit                        Stability                                               No issues
                                                                          Allowed in pipelines                                       Yes
                                                                                                                                                                     Unit allows the
                                                                          Practical limit in blend           No limit with proper labeling; 85% sold in California   plant to process
                                                                                                                                                                     advantaged,
                                          Deoxygenation                                                                                                              low carbon
                                                                                                                                       H2
                                             Reactor                                                                                                                 intensity
                                                                                                                                                                     feedstocks
    Feedstocks:
 Used Cooking Oil,                                                                                                       Product
 Recycled Animal                            Separation                            Isomerization
                                                                                                                        Separation
 Fats and Inedible
      Corn Oil

                                                                                                  Light Fuels /         Renewable              Renewable
                                               Water                                                Propane              Naphtha                 Diesel

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Questions and Answers

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Appendix Contents

                            Topic                                                                                     Pages
                            Major Refining Processes – Crude Processing                                                  28

                            Major Refining Processes – Cracking                                                          29

                            Major Refining Processes – Combination                                                       30

                            Major Refining Processes – Treating                                                          31

                            Refining and Renewable Diesel Acronyms                                                       32

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Major Refining Processes – Crude Processing

• Definition
         • Separating crude oil into different hydrocarbon groups.
         • The most common means is through distillation.
• Process
         • Desalting – Prior to distillation, crude oil is often desalted to remove corrosive salts as well as metals and other suspended
           solids.
         • Atmospheric distillation – Used to separate the desalted crude into specific hydrocarbon groups (straight run gasoline, naphtha,
           light gas oil, etc.) or fractions.
         • Vacuum distillation – Heavy crude residue (“bottoms”) from the atmospheric column is further separated using a lower-
           pressure distillation process. Means to lower the boiling points of the fractions and permit separation at lower temperatures,
           without decomposition and excessive coke formation.

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Major Refining Processes – Cracking

• Definition
         • Breaking down large, heavy hydrocarbon molecules into smaller hydrocarbon molecules through application of heat (thermal) or
           the use of catalysts.
• Process
         • Coking – Thermal non-catalytic cracking process that converts low value oils to higher value gasoline, gas oils and marketable
           coke. Residual fuel oil from vacuum distillation column is typical feedstock.
         • Visbreaking – Thermal non-catalytic process used to convert large hydrocarbon molecules in heavy feedstocks to lighter
           products such as fuel gas, gasoline, naphtha, and gas oil. Produces sufficient middle distillates to reduce the viscosity of the
           heavy feed.
         • Catalytic cracking – A central process in refining where heavy gas oil range feeds are subjected to heat in the presence of
           catalyst, whereby large molecules crack into smaller molecules in the gasoline and lighter boiling ranges.
         • Catalytic hydrocracking – Like cracking, used to produce blending stocks for gasoline and other fuels from heavy feedstocks.
           Introduction of hydrogen in addition to a catalyst allows the cracking reaction to proceed at lower temperatures than in catalytic
           cracking, although pressures are much higher.

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Major Refining Processes – Combination

• Definition
         • Linking two or more hydrocarbon molecules together to form a large molecule (e.g. converting gases to liquids) or rearranging to
           improve the quality of the molecule.
• Process
         • Alkylation – Important process to upgrade light olefins to high-value gasoline components. Used to combine small molecules
           into large molecules to produce a higher octane product for blending into gasoline.
         • Catalytic reforming – The process whereby naphthas are changed chemically to increase their octane number. Octane number is
           a measure of whether a gasoline will knock in an engine. The higher the octane number, the more resistance to pre or self–
           ignition.
         • Polymerization – Process that combines smaller molecules to produce high octane blendstock.
         • Isomerization – Process used to produce compounds with high octane for blending into the gasoline pool. Also used to produce
           isobutene, an important feedstock for alkylation.

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Major Refining Processes – Treating

• Definition
         • Processing of petroleum products to remove some of the sulfur, nitrogen, heavy metals, and other impurities
• Process
         • Catalytic hydrotreating and hydroprocessing – Used to remove impurities (e.g. sulfur, nitrogen, oxygen, and halides) from
           petroleum fractions. Hydrotreating further upgrades heavy feeds by converting olefins and diolefins to paraffins, which reduces
           gum formation in fuels. Hydroprocessing also cracks heavier products to lighter, more saleable products.

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Refining and Renewable Diesel Acronyms
•   AGO – Atmospheric Gasoil                                             •   HAGO – Heavy Atmospheric Gasoil              •   P–P – Propane–Propylene
•   API – American Petroleum Institute                                   •   HCU – Hydrocracker Unit                      •   PSI – Pounds per Square Inch
•   ATB – Atmospheric Tower Bottoms                                      •   HDS – Hydrodesulfurization                   •   RBOB – Reformulated Blendstock for Oxygenate Blending
•   B–B – Butane-Butylene Fraction                                       •   HDT – Hydrotreating                          •   RDS – Resid Desulfurization
•   BBLS – Barrels                                                       •   HGO – Heavy Gasoil                           •   RFG – Reformulated Gasoline
•   BPD – Barrels Per Day                                                •   HOC – Heavy Oil Cracker (FCC)                •   RFS – Renewable Fuel Standard
•   BTC – Blenders Tax Credit                                            •   H2 – Hydrogen                                •   RIN – Renewable Identification Number
•   BTX – Benzene, Toluene, Xylene                                       •   H2S – Hydrogen Sulfide                       •   RON – Research Octane Number
•   CARB – California Air Resource Board                                 •   HF – Hydroflouric (acid)                     •   RVP – Reid Vapor Pressure
•   CCR – Continuous Catalytic Regenerator                               •   HVGO – Heavy Vacuum Gasoil                   •   SMR – Steam Methane Reformer (Hydrogen Plant)
•   CI – Carbon Intensity                                                •   kV – Kilovolt                                •   SOX – Sulfur Oxides
•   DAO – De–Asphalted Oil                                               •   kVA – Kilovolt Amp                           •   SRU – Sulfur Recovery Unit
•   DCS – Distributed Control Systems                                    •   LCFS – Low Carbon Fuel Standard              •   TAME – Tertiary Amyl Methyl Ether
•   DHT – Diesel Hydrotreater                                            •   LCO – Light Cycle Oil                        •   TAN – Total Acid Number
•   DSU – Desulfurization Unit                                           •   LGO – Light Gasoil                           •   UCO – Used Cooking Oil
•   EPA – Environmental Protection Agency                                •   LPG – Liquefied Petroleum Gas                •   ULSD – Ultra Low Sulfur Diesel
•   ESP – Electrostatic Precipitator                                     •   LSD – Low Sulfur Diesel                      •   ULSK – Ultra Low Sulfur Kerosene
•   FCC – Fluid Catalytic Cracker                                        •   LSR – Light Straight Run (Gasoline)          •   VGO – Vacuum Gasoil
•   GDU – Gasoline Desulfurization Unit                                  •   MON – Motor Octane Number                    •   VOC – Volatile Organic Compound
•   GHT – Gasoline Hydrotreater                                          •   MTBE – Methyl Tertiary–Butyl Ether           •   VPP – Voluntary Protection Program
•   GOHT – Gasoil Hydrotreater                                           •   MW – Megawatt                                •   VTB – Vacuum Tower Bottoms
•   GPM – Gallon Per Minute                                              •   NGL – Natural Gas Liquids                    •   WTI – West Texas Intermediate
                                                                         •   NOX – Nitrogen Oxides                        •   WWTP – Waste Water Treatment Plant

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Cautionary Statement
This presentation contains forward-looking statements made by Valero Energy Corporation (“VLO” or “Valero”)
within the meaning of federal securities laws. These statements discuss future expectations, contain projections of
results of operations or of financial condition or state other forward-looking information. You can identify forward-
looking statements by words such as “believe,” “estimate,” “expect,” “forecast,” “could,” “may,” “will,” “targeting,” or
other similar expressions that convey the uncertainty of future events or outcomes. These forward-looking
statements are not guarantees of future performance and are subject to risks, uncertainties and other factors, some
of which are beyond the control of Valero and are difficult to predict including, but not limited to, the effect, impact,
potential duration or other implications of the COVID-19 pandemic. These statements are often based upon various
assumptions, many of which are based, in turn, upon further assumptions, including examination of historical
operating trends made by the management of Valero. Although Valero believes that the assumptions were
reasonable when made, because assumptions are inherently subject to significant uncertainties and contingencies,
which are difficult or impossible to predict and are beyond its control, Valero cannot give assurance that it will
achieve or accomplish its expectations, beliefs or intentions. When considering these forward-looking statements,
you should keep in mind the risk factors and other cautionary statements contained in Valero’s filings with the
Securities and Exchange Commission, including Valero’s annual reports on Form 10-K, quarterly reports on Form 10-
Q, and other reports available on Valero’s website at www.valero.com. These risks could cause the actual results of
Valero to differ materially from those contained in any forward-looking statement.

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Investor Relations Contacts

 Our products fuel modern life
 and make a better future                                                                                                     Homer Bhullar
 possible                                                                                                                     Vice President, Investor Relations
                                                                                                                              210.345.1982
                                                                                                                              Homer.Bhullar@Valero.com

                                                                                                                              Eric Herbort
                                                                                                                              Senior Manager, Investor Relations
                                                                                                                              210.345.3331
                                                                                                                              Eric.Herbort@Valero.com

                                                                                                                              Gautam Srivastava
                                                                                                                              Senior Manager, Investor Relations
                                                                                                                              210.345.3992
                                                                                                                              Gautam.Srivastava@Valero.com

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