Thread: biodiesel
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Old 04-07-2005, 08:32 AM
Satch Satch is offline
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Join Date: Mar 2005
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Biodiesel is usually fine for older cars unless you have old type seals (i.e not Viton) which can suffer. But you need to take care with with newer generation very high pressure pump systems. "Biodiesel" is a Methyl Ester which has poor lubrication properties and as a chemical is quite unpleasant.

So it is OK mixed in small proportions with normal diesel but must have lubricity additives. But if you read the MB handbook on new diesel cars you will see that it is not a "permitted fuel" and I have heard a tale of a warranty claims being rejected where use of home made 100% biodiesel had rendered the pump & injectors scrap.
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