Quote:
Originally Posted by Piotrsko
... If it gets discolored you are exchanging consumption for contamination.
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In other words, piston ring blowby into oil in the crankcase instead of valve stem seal leakage of oil into the combustion chamber when the car is off, yes? I guess a leaking head gasket could also allow high pressure combustion gasses into the oil passages, too. But the oil would not likely be high pressure enough to cross through the head gasket into the combustion chamber, would it?