Quote:
Originally Posted by Railcarmover
I'd caution against using too much in the fuel, the intake valve and bowl isn't subject to the cleaning effect of heat the exhaust side has, any oil deposited in this area doesn't wash, it combines with carbon to make a tar-like substance.This is prevalent in an engine I'm doing now,a gummy build up in the intake bowl and back of intake valve,way more than there should be with a low mileage engine this is..
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I have used MMO and don't believe it does harm when used as directed and may do some good.
I've always wondered, however, how it can help lubricate the exhaust valve stem and guide (when used in the fuel). I can see that when it is drawn past the intake valve that it could coat part of the stem and help lube it. On the exhaust side, however, it is burned up by combustion before the exhaust valve opens.
Ideas?