Quote:
Originally Posted by Ralph Spoilsport
The coolant in your engine is regulated. The coolant in your radiator is not. So a guy in Canada (eh?) commuting to work in Winter would see his oil chilled quite undesirably.
Water entering the radiator does so at the temperature of the water outlet manifold, but under low load, that water flow is really small and it's cooling rapidly as soon as it hits the radiator.
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You might just be right. I was thinking the water flow being so little would prevent the oil from being cooled further. But the water sitting in the radiator is going to cool while it sits in there and thus cool the oil as well. The temperature difference created by the oil heating the water would likely be enough to cause the water in the radiator to flow internally, ensuring the oil is cooled even more.
Thanks for the eye opener, eh.