Thanks, Roger *GRIN*. Actually you could burn animal fat but it has to be heated hotter than veggie oil.

And Charley has a point. Apparently cars that burn waste veggie oil smell like french fries or whatever was cooked in that oil. NOT good for keeping away the munchies. Remember Cheech and Chong's marijuana van and the motorcycle cop that trailed them through the smoke? Once he got them stopped all he could do was cop some snacks off them.