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Old 03-09-2007, 08:40 AM
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jshadows jshadows is offline
Join Date: Jan 2006
Location: Paris, FR
Posts: 737
Originally Posted by JackG View Post
A big thing with WVO is to evaluate your car and determine how long you want it to run. The rings will start to go bad at some point in time with these motors. When this happens, fuel that is left on the cylinder walls will find itself in the crankcase, whether it is bio,dino,or WVO. If that fuel is WVO, it contains glycerin that will attack bearing etc. I plan on keeping my car for far more than another 100k so WVO is not an option for me.
If I had a rusted up beater that only had another yr or 2 left in the body, that would be a different story.
There is no glycerin in WVO. It is a byproduct of the chemical reaction between the alcohol and fatty acid (the WVO) which produces the esters, methyl or ethyl, more commonly know of as biodiesel. WVO is more or less chemically homogenous notwithstanding the sugars etc left there by the food that was cooked in it.

The lesser known of the WVO is polymerization and combustion problems which can lead to deposits in the lands of the rings. Of course there's coking and deposit problems at the injector and IP points as well being the most documented. I have yet to see a piston and rings from a long term WVO powered diesel.
1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)
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