Quote:
Originally Posted by schnickelfritz
If I remember right there is a method for converting used cooking greases/oils into crude biodiesel...the whole "My Jetta smells like freedom fries" thing. I would not expect it to run well in a more advanced diesel, but would expect it to run OK in a multifuel engine or older conventional diesel.
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All you need to add is lye (sodium hydroxide) and methanol. The rest of the process is simple, blending and gentle heating. Problems include: biodiesel made with cooking greases and oils becomes thick and goopy in cold weather; biodiesel made using those ingredients will damage natural rubber hoses and seals used in older engines; it has a fairly short shelf life (weeks to months at best).