Originally Posted by log673

If you wish to run your car on Waste Vegetable Oil (chemically unmodified oil) you must install a seperate tank for regular diesel which you will use to start up your car and get it up to operating temp. at which point you can switch over to the veggie. I have never done it this way, but I have quite a bit of experience with biodiesel.

In a nutshell, biodiesel won't do you much good since nutshells will not fit through your fuel line. However, in a figurative nutshell, this is how biodiesel is made:

Veggie oil is made from fatty acids bonded to an alchohol, which in veggie oil is glycerin. The goal of transesterification (the process by which biodiesel is made) is to replace this glycerin with a lighter alcohol. (generally methanol)



You don't have to modify your car at all for biodiesel. (with the exception of replacing rubber fuel lines, and changing your filters a lot initially.)

I've had to quit making biodiesel since I moved to go to school, but I hope to begin buying it commercially soon. (or just make a hell of a lot of it during spring break and summer)