Holly Frontier Corporation

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Sinclair Refinery is one of the longest running industrial plants in the West. It refines more than 20,000 barrels of petroleum products per day. The refinery utilizes a range of refining technologies to produce high-octane gasoline. Sinclair Refinery is a part of Sinclair Oil Corporation, which is one of the largest oil companies in the United States since 1916. The parent company has a staff of geologists, geophysicists, engineers and petroleum landmen. It operates Over 1,000 miles of pipeline to crude oil and finished products to various marketing terminals. Sinclair Oil Corporation offers special motor oil for engines operating at high temperatures and under heavy loads.