Refining crude oil – Oil and petroleum products explained

Petroleum refineries convert crude oil and other liquids into many petroleum products that people use every day. Most refineries focus on producing transportation fuels. On average, U.S. refineries produce, from a 42-gallon barrel of crude oil, about 19 to 20 gallons of motor gasoline; 11 to 13 gallons of distillate fuel most of which is sold as diesel fuel; and 3 to 4 gallons of jet fuel.