Quote:
Originally Posted by Lukasz Klimczewski
Water gets tempersture from engine block so it's obvious that oil temp will be same as coolant if not higher...., it needs more time to worm up autogearbox oil.
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Nope. Oil takes a lot longer to get up to temperature compared to the water. Oil isn't warmed by the block, but by the friction it "reduces". The oil is pumped into the oil channels and into bearings. These heat it, but not loads at once. Oil can be "lightly warm" when the engine is up to operating temperature (by the water). Being more dense than water, makes it harder to heat as well.
Ever done an oil change on an engine which has been idling itself up to water temperature? The oil isn't really warm at all. Just a little more liquidy than cold.