Any really good sites on info about cars running on vegetable oil?

I have a project about greener technology and i need to answer the following question


Who, what, where, when, why. and how


and is there a specific company doing this?


Any info or sites given would be appreciated thanks!Any really good sites on info about cars running on vegetable oil?
Do a search on biofuel, or biodiesel A lot of the big semi trucks run on it.Any really good sites on info about cars running on vegetable oil?
I don't know about specifics, but I found this article on ehow.com on how to convert your diesel auto to run on vegetable oil. It can't be a gasoline auto, it has to be a diesel engine