Running your vehicle on waste vegetable oil (WVO) or straight vegetable oil (SVO) is different than running your vehicle on biodiesel. Here are some main differences and some external links to provide more in depth, technical information. Diesel engines are required for both!
WVO - Vegetable oil that has already been used (by a restaurant) to cook food, and is ready for disposal. Traditionally the WVO is discarded by the restaurant in a grease dumpster and picked up by a company that then uses the oil for processing in animal foods, farm products and more. In some cases restaurants are paid by the company for their oil, and other cases restaurants have to pay the company for the pick-up service. In either case, negotiations have to be made with the restauranteur to pick up their oil (hopefully for free). I'm starting to get on a tangent about collecting WVO and that's a different post!
SVO - New vegetable oil, can be purchased in bulk or in small containers at grocery stores & supermarkets. Current market price for a gallon of SVO is higher than a gallon of diesel fuel.
Biodisel - Diesel-equivalent processed fuel consisting of short chain alkyl (methyl or ethyl) esters, made by transesterification of vegetable oils or animal fats, which can be used (alone, or blended with conventional diesel fuel) in unmodified diesel-engine vehicles. Biodiesel can be found at pumps across the country, commonly known as B100, B80, B25, etc. The number signifies the percentage of biodiesel mixed with diesel.
http://www.biodieselwvo.com/
My friend Biodeezo John makes Biodiesel at a plant in Milan, MI - http://mosaicbiodiesel.com/
http://www.greencarcongress.com/2005/01/biodiesel_or_sv.html
http://journeytoforever.org/biodiesel_svo.html
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