Marathon Petroleum is a U.S. oil refiner and midstream operator headquartered in Findlay, Ohio.
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Marathon Petroleum's Scope 1 and Scope 3 emissions are rising (Scope 1 34.6 Mt and use-of-products Scope 3 405 Mt in 2024) while it moves from absolute to intensity targets. Operationally disclosed and third-party verified, but the trajectory is worsening. Pattern of environmental enforcement, trade-group climate obstruction, and abandoned absolute emissions reduction targets define the weakness.
Marathon Petroleum scores 17/100 (Significant gaps) on SINK's independent climate assessment, scored from public data only. Fees pay for the review, never the result. Last verified October 2026.
That places Marathon Petroleum joint 828th of 847 companies scored, and joint 10th of 16 in Oil & Gas.
Where Marathon Petroleum sits among oil & gas peers.
Among the 16 major oil & gas brands we've scored, Marathon Petroleum is tied =10th of 16, with 3 others.
Its three lowest-scoring questions, and what the evidence didn't show.
Company claims eleven consecutive years of lower intensity, but absolute emissions have risen since 2020.
Bay Area regulators fined Martinez refinery for flaring and emissions violations.
No RE100 membership, renewable power purchase agreements, or renewable electricity target found for refineries.
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Get in touch →Strongest on Carbon Footprint — Operations and Transparency & Accountability (7/10, 7/10). Weakest on Emissions Trajectory and Controversies & Red Flags (0/10, 1/10).
The 3 companies in the sector scoring nearest above Marathon Petroleum.
TotalEnergies reports granular emissions data but plans 3% annual oil and gas production growth through 2030, negating absolute emission reductions.
See the breakdown →Equinor is a fossil fuel operator claiming energy transition while expanding oil and gas production 10%+ by 2027.
See the breakdown →Exxon Mobil operates with minimal climate accountability.
See the breakdown →The formula and all 10 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale10 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
“Total Scope 1 GHG Emissions(7)(8) million tonnes CO₂e - 305-1-a CCE-4 - C1 32.2 33.0 33.7 33.0 34.6”
“We have existing targets for reducing Scope 1 & 2 GHG emissions intensity, for lowering methane emissions intensity and for lowering our freshwater withdrawal intensity.”
“Marathon Petroleum's scope 3 intensity has not decreased since 2019.”
“Eleventh consecutive year of lowering GHG emissions intensity (cumulative 30% reduction since 2014)”
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Marathon Petroleum is a U.S. oil refiner and midstream operator headquartered in Findlay, Ohio. It was incorporated in 2009 in a restructuring of Marathon Oil and operates refineries, renewable diesel facilities and the MPLX midstream partnership. It had about 18,500 employees and $132.7 billion in FY2025 revenue.
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