Imagine your car running on the vegetable oil recycled from fast food deep fryers. Made from a variety of plant and animal sources, Biodiesel is typically blended into regular diesel fuel at concentrations of up to 20%. In short, the advantages of using this renewable fuel are: less pollution and improved engine lubricity. Country music legend Willie Nelson has invested in America's first branded biodiesel blend-- "BioWillie"-- available at truckstops in Texas. In Continental Europe, biodiesel is commonly available in a 5% blend.
Please do not try this at home!
As we understand it, using Biodiesel will violate the warranty on your smartcar.