Los Angeles is the home of LOVECRAFT biofuels (
www.lovecraftbiofuels.com) which is an indy-garage that "converts" diesel engines to run on Waste veggie oil. (the conversion is a relatively simple process - my school bus only took 1/2 day to convert). This is better and cleaner than biodiesel because you are using a waste product and there is no need for processing. I urge those considering diesel & biodiesel to look at Waste Veggie OIl (WVO) as a great local option.