Making Bio Diesel is not is not hard to do. Most people know that they can make it from a combination of vegetable oil and regular diesel gasoline. The problem is that many people do not filter there cooking oil, make the proper adjustments to their vehicles if they do not specify bio diesel, or know how to get cooking oil much cheaper than regular diesel gasoline. With the proper know how, you can pay as little as 50 cent per gallon of diesel gasoline just by making gas it at home. Their are other fuels you can learn how to make at home as well: Learn how to make E85, Gasohol, and how to run your car on water by making hydrogen cells.
If you want to learn how to make gasoline at home go to http://www.1dollar4gas.webs.com and check out "Gas Money" You will learn how to make all of the fuels mentioned above.