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Series 60 oil pressure in cold weather
#2

Every engine that I've owned that had a real oil pressure gauge would have the oil pressure drop as the engine warmed up. And, all those engines ran slightly higher pressure in cold weather than warm, even though the coolant temp read the same. We could get into all the complexities of thermodynamics and produce a tome of epic proportions that would both bore you and put you to sleep, but the simplistic explanation is that the colder the weather the easier it is for the engine to rid itself of waste heat in ways that produce slightly cooler and thicker oil. If the weather and the engine get cold enough the oil cooler, which exchanges heat with the engine coolant, becomes an oil heater.

Jon Kabbe
1993 coach 337 with Civic towed
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Series 60 oil pressure in cold weather - by House Divided - 01-08-2018, 04:29 PM
RE: Series 60 oil pressure in cold weather - by 77newell - 01-08-2018, 06:06 PM

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