You need to go over to www.biodiesel.infopop.cc and look in the SVO section. That site is the repository for information about alternative fuels in the way that this site is the repository for information about MBs.

Your WVO must be absolutely water free before it ever goes into the tank. No oil water separator will do that. It will only remove the suspended water.

-Jim
(I'm part way through my conversion right now.)

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.