Frontier Oil Corporation and its subsidiaries engage in crude oil refining, and wholesale marketing of refined petroleum products. The company purchases crude oil to be refined, and markets the refined petroleum products, including various grades of gasoline, diesel fuel, jet fuel, asphalt, chemicals, and petroleum coke. It operates refineries in Cheyenne, Wyoming and El Dorado, Kansas with an oil capacity of approximately 162,000 barrels per day. The Cheyenne refinery markets its refined produc ...

Cummins Inc., a global power leader, is a corporation of complementary business units that design, manufacture, distribute and service engines and related technologies, including fuel systems, controls, air handling, filtration, emission solutions and electrical power generation systems. Headquartered in Columbus, Indiana (USA), Cummins serves customers in more than 160 countries through its network of 550 company-owned and independent distributor facilities and more than 5,000 dealer locations. ...

Sunoco, Inc., through its subsidiaries, manufactures and markets various petroleum products, including fuels, lubricants, and petrochemicals in the United States. It also manufactures chemicals and has interests in logistics and cokemaking. The company operates in five segments: Refining and Supply, Retail Marketing, Chemicals, Logistics, and Coke. The Refining and Supply segment manufactures petroleum products, including gasoline; and middle distillates, such as jet fuel, heating oil, and diese ...

Lyondell Chemical Company, through its subsidiaries, engages in the manufacture and sale of chemicals and plastics, production of fuel products, and refining of heavy and high-sulfur crude oil worldwide. It operates in four segments: Ethylene, Co-Products, and Derivatives (EC D); Propylene Oxide and Related Products (PO RP); Refining; and Inorganic Chemicals. The EC D segment produces ethylene; ethylene co-products, such as propylene, butadiene, and aromatics; and derivatives, including polyethy ...

Convenience stores and travel centers. quiktrip is a convenience store with quality services.

Owns, operates and franchises convenience stores offering broad range of food and non-food products, including self-service gasoline.

Tesoro Corporation, headquartered in San Antonio, Texas, is a Fortune 150 and a Global 500 company with approximately 5,500 employees. As a leading independent refiner and marketer of petroleum products, Tesoro, through its subsidiaries, operates seven refineries primarily in the western United States with a combined crude oil capacity of more than 660,000 barrels per day (bpd).