CountryMark is an American-owned oil exploration, production, refining and marketing company. The company’s complete line of premium quality liquid fuels begins with light, sweet crude oil, which is refined to the highest specifications at the CountryMark refinery in Mt. Vernon, Indiana. Fuel quality is protected as it travels north along a 238-mile private pipeline. State-of-the-art blending technology at each CountryMark fuel terminal ensures that biodiesel and ethanol blended fuels are formulated for optimal driving performance and winter operability.