A 25,000-barrel per-day oil refinery, the Casper Refinery runs primarily sweet crude from the Rocky Mountain region. Casper started as White Eagle Refinery in 1923 and is one of the oldest refineries still operating in the Rocky Mountains today. It was acquired from Mobil Oil in 1968 and named the Little America Refining Company. We have since modernized the refinery to increase reliability and production capacity while lowering sulfur levels in transportation fuels. Casper is near Sinclair’s central hub for crude oil supply and capable of running both domestic and Canadian synthetic crudes. The refinery is an efficient producer of gasoline and diesel, which we ship to customers in Wyoming, Idaho, Utah, Nevada, Nebraska, Colorado, Montana and South Dakota. The Casper Refinery team has created a culture driven by excellence in safety, reliability, production, environmental stewardship and community involvement. The goal for the Casper Refinery is to update and modernize equipment to maintain reliable production well into the future.