Marathon Petroleum Earns Six Refinery Energy Star Certifications
Six company refineries and two office buildings received 2026 Energy Star certifications for energy efficiency.
Updated on Nov. 10, 2026 in Oil and Gas
Marathon Petroleum Corp. received 2026 Energy Star certifications for six of its refineries, located in Canton, Ohio; Garyville, La.; Robinson, Ill.; St. Paul Park, Minn.; Anacortes, Wash.; and Salt Lake City, Utah. The certified refineries rank in the top 25% of similar facilities nationwide for energy efficiency during the 2025 operating year.
Why it matters
The certifications mark the second consecutive year the same six refineries have earned the designation, and Marathon's total refinery certifications now stand at 85. The Canton and Garyville refineries have earned 21 consecutive certifications since 2006.
The Focus on Energy program avoided nearly a billion Btu per hour of energy consumption in 2025, equivalent to the annual usage of 60,000 homes or 100,000 gasoline-powered passenger vehicles. Certification relies on Energy Intensity Index scores, with the company's total refinery certifications now at 85.
The players
Marathon Petroleum Corp.
A Findlay, Ohio-headquartered refiner that operates one of the largest refining networks in the United States.
Energy Star
A voluntary U.S. government-backed program run by the Environmental Protection Agency and Department of Energy that recognizes energy-efficient products and buildings.
Solomon Associates
A consulting firm that developed the Energy Intensity Index used to benchmark refinery energy performance.
The details
Certification requires top-quartile Energy Intensity Index performance verified by a licensed professional engineer, along with compliance with environmental requirements. The Findlay, Ohio headquarters campus and the San Antonio, Texas office building also earned 2026 Energy Star certifications.
Timeline
2006: Canton and Garyville refineries first earned Energy Star certification.
2025 operating year: Refinery energy efficiency measured for the top-25% ranking.
2026: Six refineries and two buildings received certifications.
Market Landscape
Energy Star certification under the Energy Intensity Index benchmarking framework has become a recognized competitive marker among U.S. refiners seeking to demonstrate operational efficiency. Marathon's continued streak of certifications at its Canton and Garyville facilities places it among the longest-running certified refinery portfolios in the country.
Energy-efficiency improvements at refineries can influence operating costs that shape fuel production economics over time. The certifications do not directly alter consumer fuel prices or availability in the source material.
The takeaway
Consistent energy-efficiency benchmarking gives refiners measurable targets for reducing consumption year over year. Readers tracking the sector can use Energy Star rankings as one indicator of operational performance.
Further reading
Explore more reporting in the Oil and Gas section for industry context.
Source note: This article includes information reported by CStore Decisions.
