Investor Presentaiton

Permian Crude Pipelines M MARATHON Investments in long-haul pipelines generate stable, fee-based midstream income and also help lower feedstock costs tor MPC refineries Gray Oak Pipeline - MPC, Diamondback Energy, PSXP ~850 mile, 30-inch diameter TEXAS - Anticipate in-service 4Q19 ■ Wink-to-Webster Pipeline (W2W) Wink Orla Crane - Signed letter of intent to partner with Exxon Mobil, Plains All American, and Lotus Midstream 36" mainline with 1.5 MMBPD capacity - Anticipate in-service first half of 2021 Wink-to-Webster Pipeline Gray Oak Pipeline Texas City Corpus Christi 'Galveston Bay 37

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