Bio desiel sucks if you try to use it when it gets cold. My brother is a mechanic at a trucking company and they had to use it for one of their contracts last winter as the customer wanted their products shipped as green friendly as possible. They had to give the drivers extra fuel filters as they could not make the 450 mile round trip without changing it once. Even then during a real cold period they had drivers not make it using only one replacement filter. The stuff gels up when cold. It doesn't have the same shelf life as fossil diesel either. If the demand for biodiesel gets high enough, the price will go up. Restraunts won't give it away anymore and the price for soybean, canola, and other oil producing plants will go up. Using our farm land to produce fuel doesn't seem like a great idea to me. I can't wait for politicians to be investigating price fixing in the farming industry when the prices go up and voter start complaining.