Note:  Do not rely on this information. It is very old.

Oil Engines

Oil-Engines, the term usually applied to those engines in which the oil fulfils one or two functions; it may be used as fuel, or be the working agent itself, being converted into gas in the cylinder, as water is into steam in the steam-engine. An oil both easily obtained and cheap is necessary for success, hence the Priestman Oil-Engine (1888) by using petroleum marked a distinct epoch in the history of heat-engines. Oil-engines are usually small and compact; they require very little hand-labour, and can be started or stopped instantaneously.

“But in your hearts set apart Christ as Lord. Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect.”
1 Peter 3:15