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re: Synths, remove deposits and cause oil use - NOT!
Mike Marion said:
>THINK ABOUT IT! Synths main selling point is ability to resist THERMAL
>BREAKDOWN. That means they don't change chemical and molecular makeup when
>the sh*t hits the frying pan (so to speak). That's positively wonderful
>for bearings and wear surfaces (like turbos eh!) in a hot engine. It sucks
>for the combusion chamber 'cause the stuff isn't going to burn and blow out
>the exhaust, its just gonna get sticky and hang around (deposits).
Is this your conjecture, or is it really established that synthetic oils
are not combustible during gas engine combustion cycles? The fact that
synth oil has high(er) resistance to thermal breakdown (decomposition) at
high engine-operating temperatures does not in necessarily imply its
non-combustibility (to say nothing of plain ol' vaporization.) Synthetic
oil _could_ burn in the cylinders--even while resisting (better than dino
oil) "thermal breakdown" elsewhere in the engine. Does it? I don't know.