Biodiesel is a fuel produced from renewable resources like vegetable oil rather than petroleum and can be directly used as a fuel or blended with conventional diesel fuel made from petroleum (petrodiesel). Biodiesel can run in almost any vehicle that can run on petrodiesel with few or no modifications.

Diesel makes up 22% of the ground transportation fuel in the U.S., and can now be manufactured in synthetic form at a cost using vegetable oil that is competitive with petroleum based Ultra Low Sulfur Diesel. This fuel is called biodiesel, which is also less toxic to humans and the environment and better for diesel engines. At 200 million gallons, biodiesel made up just over.5% of the nearly $100 billion in on highway diesel fuel consumed in the U.S. in 2006. Biodiesel production in the U.S. and abroad is growing dramatically and expected to continue.