Well. They do spend very little money to get biodiesel . And much less than paying for the average fuel. Just what is their secret? I'll tell you: "They MAKE their own biodiesel" Yes. They make their own biodiesel. And let's not assume they are professors or people with great knowledge in chemistry. They are in fact lay people, just like you. Learning how to make biodiesel is possibly easy . So much so that the good thing is, you don't have to spend money on classes just to learn how to make your own biodiesel . In fact, a couple of books and information from here and there is enough to teach you. "Now, if I were to offer you an E-book that guarantees to teach you and guide you fully to making your homemade biodiesel SUCCESSFULLY , in a simple and concise manner plus it will only cost you $39.00 . Would you be interested in my E-book? " If you are, here's the E-book that will guide you on making your own biodiesel! "How To Make Your Own Biodiese...