"100 years ""ago,"" Rudolf Diesel designed his original engine to operate on plant oils. ""Later,"" plant and animal oils were converted into a ""clean,"" low-carbon petrodiesel-compatible fuel known as biodiesel. In the early ""1980s,"" home brewers discovered they could transform waste restaurant fryer oils into crude biodiesel and use it in automobiles at 4-Jan the cost of petrodiesel. Yet the automotive industry insists that biodiesel may damage late-model vehicles. This book separates fact from fiction to educate the public on producing quality biodiesel."