Anybody got any good links to articles on home brewed biodesel? I've seen some really low costs tossed about using waste veggy oil but I'm wondering about the whole story - like what sort of nasty byproducts are left over from the reaction? How do you dispose of them? How long does the "brew" have to sit for the reaction to take place. How tough is it to mod the fuel vehicle system so the alcohols don't trash the seals? How much waste veggy oil is really out there? Back in my days as a hamburger flipper at small hot dog establishment, we'd put about 10 gallons of waste oil a week. I think if a dozen or so people here in Boulder decided to go homebrew, the WVO supply would dry up.