You can grow your own by using algae.
http://www.unh.edu/p2/biodiesel/article_alge.html


"John T" wrote in message ...
I think bio-diesel is overblown. The premise of this stuff is to use recycled cooking oil. Even if every resturaunt in the world
recycled its cooking oil, there simply isn't enough to meet the demand if that method were to become poplar.