Converting a car to run on biodiesel isn't exactly new, but I've always been fascinated by such things. Think about it: deep fry your food, and then use the veggie oil to run your car. Plus, it makes your car smells like donuts! I mean, what's not to like? (Except trunk space, as you can see)Before you convert your diesel car into something that can run on used vegetable oil, take a look at Mario Aguierre's veggie diesel Volkswagen Jetta over at HRGBRG: Link - Thanks Diana Chang!