This is a pretty good overall summary....
http://itotd.com/articles/509/vegetable-How much does it cost to change an engine to use vegetable oil? This is for biodieselYou only convert a diesel engine, not a gas engine.
Now Nissan makes an all fuel turbo-diesel that can be put into many of their cars, but this is not an economical choice unless your engine is failing.
How much does it cost to change an engine to use vegetable oil? This is for biodiesel I spent $340. Fattywagons .How much does it cost to change an engine to use vegetable oil? This is for biodieselDo not try to use in a gasoline motor,it will clog it up..