Refineries in the United States produce about 19 to 20 gallons of motor vehicle gasoline for every 42-gallon barrel of crude oil. But it’s not just gasoline being produced in the refining process. A barrel of oil also yields other fuel types and important products, like diesel, jet fuel, asphalt, heavy fuel oil, lubricants and waxes, and petrochemical compounds that are used as the basis for plastics and other materials.