Casper refinery

Sinclair Casper Refining Company

The Casper Refinery is an economic cornerstone for central Wyoming and one of the oldest refineries still operating in the Rocky Mountains today – now modernized to increase reliability and production while lowering sulfur levels. Near our central hub for crude oil supply, the refinery serves customers in Wyoming, Idaho, Utah, Nevada, Nebraska, Colorado, Montana and South Dakota. The Casper Refinery team has created a culture driven by excellence in production, reliability and safety. 

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  • Casper, Wyoming
  • Opened in 1923
  • 30,000 barrels per day 
  • Crudes: Rocky Mountain sweet (low sulfur) crude; domestic and Canadian synthetic crudes
  • Major products: gasoline and diesel