Originally posted by Anonymous ATS
Got a friend in Highland County Ohio that runs his diesel truck on restaurant waste oil. Filtering is accomplished by running the waste veggie oil thru a still, identical to a moonshine still. Must do something to the oil, too, because he dumps the distilled product right into the truck's fuel tank and has been doing this LONG before it became fashionable.

I want to know why this seems to work for him. I've put new veggie oil in the fridge and discovered that there is liquid oil on top of the thicker oil (fractions?!?); then run some thru a stovetop still and test the result in the output of the still in the fridge to compare results.

Your friend is running Bio-diesel, not straight WVO(which can also be done but requires preheating with special "flash heaters") What he is doing is cracking it, and its not the same as distilling it. It is combined with methanol and lye and heated, then settled. The Bio-diesel is drawn off the top, and the waste glycerin is drawn off the bottom. Its very simple to do by reusing an old electric hot water heater.

TheWelder