Really odd thermostat related question
well, my car was overheating and today I decided to replace the thermostat with an oem replacement and such, well I did that and so far it *seems* to have fixed the overheating. I've tried to replicate the overheating issue and I cannot. We'll see whenever it gets hotter outside. But, my oil pressure used to be fairly low at idle when warmed up and since changing the thermostat it is now in spec. Could a thermostat have affected the oil PSI? I'd assume due to temperatures, I didn't think it'd fix the oil PSI issues at idle but it seems to have done so. Is this possible?
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I guess it depends on how much hotter your engine was running before, but higher oil temp = lower oil pressure. You might also try a different weight oil. You're in a hot climate, and the Nissan spec'd oil is 5w30. You might try Mobil 1 0w40, which is what I use in in S. Florida. Oil pressures don't peak so high when the engine is cold, but they also don't drop too low when the engine is hot. Seems like the ideal oil for our cars.
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Originally Posted by dcains
(Post 10896927)
I guess it depends on how much hotter your engine was running before, but higher oil temp = lower oil pressure. You might also try a different weight oil. You're in a hot climate, and the Nissan spec'd oil is 5w30. You might try Mobil 1 0w40, which is what I use in in S. Florida. Oil pressures don't peak so high when the engine is cold, but they also don't drop too low when the engine is hot. Seems like the ideal oil for our cars.
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A couple of my cars have oil temp gauges, and you can definitely see the inverse relationship between oil pressure and oil temp.
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