<Ul> <Li> Petroleum: <Ul> <Li> Petroleum spirit (North American term: gasoline, British term: petrol) </Li> <Li> Petroleum diesel . </Li> <Li> Autogas (liquified petroleum gas). </Li> <Li> Compressed natural gas . </Li> <Li> Jet fuel (aviation fuel) </Li> <Li> Residual fuel </Li> </Ul> </Li> <Li> Coal: <Ul> <Li> Gasoline can be made from carbon (coal) using the Fischer - Tropsch process </Li> <Li> Diesel fuel can be made from carbon using the Fischer - Tropsch process </Li> </Ul> </Li> <Li> Biofuels and vegetable oils: <Ul> <Li> Peanut oil and other vegetable oils . </Li> <Li> Woodgas, from an onboard wood gasifier using solid wood as a fuel </Li> <Li> Biofuels: <Ul> <Li> Biobutanol (replaces gasoline). </Li> <Li> Biodiesel (replaces petrodiesel). </Li> <Li> Dimethyl Ether (replaces petrodiesel). </Li> <Li> Bioethanol and Biomethanol (wood alcohol) and other biofuels (see Flexible - fuel vehicle). </Li> <Li> Biogas </Li> </Ul> </Li> </Ul> </Li> <Li> Hydrogen (mainly spacecraft rocket engines) </Li> </Ul> <Li> Petroleum: <Ul> <Li> Petroleum spirit (North American term: gasoline, British term: petrol) </Li> <Li> Petroleum diesel . </Li> <Li> Autogas (liquified petroleum gas). </Li> <Li> Compressed natural gas . </Li> <Li> Jet fuel (aviation fuel) </Li> <Li> Residual fuel </Li> </Ul> </Li> <Ul> <Li> Petroleum spirit (North American term: gasoline, British term: petrol) </Li> <Li> Petroleum diesel . </Li> <Li> Autogas (liquified petroleum gas). </Li> <Li> Compressed natural gas . </Li> <Li> Jet fuel (aviation fuel) </Li> <Li> Residual fuel </Li> </Ul> <Li> Petroleum spirit (North American term: gasoline, British term: petrol) </Li>

What are the different types of combustion engines