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Originally Posted by thstone
Does anyonw know why most car manufacturers (not just Porsche) set their factory thermostat's at around 190-200F?
Is it so the moisture gets boiled off more readily? If so, does this mean that you need to change your oil even more frequently with a low temp thermostat or that you need to be sure to get your engine all the way up to full temp fairly often?
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It is done
purely for emissions purposes, to get the engine hot as fast as possible.
And, no, there is no moisture build up in your oil, it still gets more than hot enough to get rid of any moisture. If anything, your oil will be happier and actually live longer running at lower temps................