Other kinds of oil are made from crude oil ("petroleum") which comes from under the ground. People use large oil wells to bring the oil up to the surface. The oil is sent in special ships called tankers or in pipelines to factories called refineries where it is distilled into LPG, gasoline ("petrol"), diesel fuel, and fuel oil. Plastics are among the Petrochemicals made from crude oil or natural gas. Oils from crude oil are also used as fuels for engines or as lubricants to make the parts of machines work together without sticking or stopping.