I do know alot guys that have had problems with the biodiesel. The way I understand it is that the stuff "washes" down all your components. When you have something that has burning Low Sulfur and even High sulfur diesel for 30 years, there's alot of residue on everything. That residue translates to glogged fuel filters and clogged injectors. The bio stuff isn't cold friendly either, lots of guys have installed tank heaters and heated fuel filters.
Living here in the Midwest, it's not a problem finding veggie oil. You don't even have to mess with the restaurant stuff. ADM (Archer Daniels Midland) will sell the stuff by the drum. It's already 100% pure.
