Quote:
Originally Posted by BlueWhelan
The problem isn't about the oil itself degrading (it can take it), its about the drop in viscosity and oil pressure that results from elevated temperatures. Its the oil pressure drop that kills engines, and the main cause of that is high oil temperature.
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This. Oil thins when hot. Thin oil has less pressure at the same volume, and our engines do not take well to low pressure. Cooling the oil works well because pressure drop is reduced, you're not cooling the oil so much because of it just being hot.
