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Our Refineries

We operate six refineries in the western United States with a combined capacity of 850,000 barrels per day.

Powered by the deep engineering expertise of our workforce, these highly advanced facilities refine domestic and foreign crude oils into transportation fuels and other petroleum products that help drive the markets we serve.

At our refineries – and everywhere we do business – the health and safety of our employees, customers and communities is our number one priority and an integral part of our culture. We continually evaluate and invest in technologies and systems to support safe, reliable and clean operations.

Refinery Location Crude Oil Capacity Fast Fact
Anacortes Refinery Anacortes, Wash. 120,000 bpd First facility on the West Coast to receive cost-advantaged Bakken shale oil by unit train
Kenai Refinery Kenai, Alaska 72,000 bpd Tesoro’s first refinery
Los Angeles Refinery Los Angeles, Calif. 363,000 bpd As one of the largest refineries on the West Coast, it supplies 50 percent of jet fuel used by Los Angeles International Airport
Mandan Refinery Mandan, N.D. 71,000 bpd Only operating refinery in North Dakota
Martinez Refinery Martinez, Calif. 166,000 bpd Second-largest refinery in Northern California
Salt Lake City Refinery Salt Lake City, Utah 58,000 bpd Largest refinery in Utah


Our refineries are supplied by domestic feedstocks from Alaska (Cook Inlet and North Slope), California (San Joaquin Valley and Los Angeles Basin), Colorado, North Dakota, Utah and Wyoming, and from foreign feedstocks that include Canada, South America, West Africa and other foreign crudes.


Petroleum products refined at our facilities include: CARB and conventional gasoline, CARB and conventional diesel fuels, jet fuel, heavy fuel oils, liquefied petroleum gas, fuel gases, asphalt, propane, propylene, petroleum coke and calcined coke.