Investor Presentaiton

2Q 2018 Projected 2Q 2019 Second-Quarter 2019 Outlook Crude Throughput¹ Other Charge/ Feedstocks Throughput¹ Turnaround Total Throughput¹ Sweet Crude Sour Crude and Major Maintenance Depreciation and Amortization Other Manufacturing Cost² Total Direct Operating Costs M MARATHON Corporate and Other Unallocated Items³ in MBPD Percent of Throughput Refinery Direct Operating Costs ($/BBL of Total Throughput) Gulf Coast Region 1,125 125 1,250 42% 58% $1.15 $1.15 $3.60 $5.90 Mid-Con Region 1,075 50 1,125 74% 26% $1.35 $1.60 $4.75 $7.70 West Coast Region 600 50 650 42% 58% $5.15 $1.50 $7.85 $14.50 MPC Total 2,800 125 2,925 55% 45% $2.15 $1.45 $5.10 $8.70 $200 MM Gulf Coast Region Midwest Region 1,156 190 1,346 35% 65% $0.56 $0.99 $3.21 $4.76 722 34 756 61% 39% $1.65 $1.66 $3.81 $7.12 MPC Total 1,878 160 2,038 45% 55% $0.98 $1.27 $3.54 $5.79 $90 MM Note: The company provides certain financial and statistical data on its website not later than the close of business on the second business day following the end of each month, and may also provide additional updates within each month. 1 Region throughput data includes inter-refinery transfers, but MPC totals exclude transfers 2 Includes utilities, labor, routine maintenance and other operating costs 3 Includes transaction costs related to the merger with Andeavor 55

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