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Originally Posted by jpmaynard
would it matter that much if the oil cooler were blocked w/cardboard in the winter if the engine isnt getting too hot and you're running synthetic?
thanks.
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Unless it's -50*f outside I think it would be safer to leave it open. With the cooling jets under the pistons, even with a cool engine, the oil can get pretty hot. The oil filter housing has the thermostat at 110*c!