Investor Presentaiton

Cash Operating Expense Index Operational Excellence: Delivers Significant Value M MARATHON 2016 U.S. Average 4th Quartile 3rd Quartile 2nd Quartile 1st Quartile ANDV '16 1 Based on prior Solomon Studies and MPC estimates Cash Operating Expense¹ MPC '16 Legacy MPC '18E Galveston Bay '14 Galveston Bay '16 Galveston Bay '19E Improve operating costs ■ Best-in-class energy efficiency and turnaround performance Supply chain cost improvement Reliability and utilization Capacity 31

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