A fuel is any material that can be made to react so that it releases chemical or nuclear energy as heat or to be used for work. The concept was originally applied solely to those materials capable of releasing chemical energy but has since also been applied to other sources of heat energy such as nuclear energy (via nuclear fission or  nuclear fusion).

Fuel is a 2009 open world racing video game developed by Asobo Studio and published by Codemasters. The game was released on June 2, for PlayStation 3 and Xbox 360, and June 5, for Microsoft Windows.