In addition to petroleum-primarily based fuel, diesel engines are able to making use of biodiesel that is certainly made from Uncooked vegetable oil, utilised cooking oils, and waste animal fats. In 1922, the U.S. federal government posted the first specifications for aviation gasolines (two grades had been designated as "combating" https://densityofjeta1fuel95270.wikififfi.com/653967/not_known_details_about_gasoline_fuel