Pardon my ignorance on the subject, but if you're going to be cleaning and filtering WVO to use as fuel, how much more work is it to add the lye and methanol and do a little bit more processing to have "real" biodiesel, which then avoids all the hassle of modifying the fuel system on the car?

Perhaps I just haven't researched this enough yet, but it seems to me that I'd rather spend the $$$ on a little bit more stuff to have in the shop to make biodiesel and not mess with the car at all, than installing a two-tank system in the car, with all the associated fuel heaters, valves, etc.

Thoughts?