Oil Change Issues! Help/Advise Needed!

dts3 · 03-09-2019, 06:13 PM

Turning on the heater brings down the water/coolant temp, not the oil.

physics · 03-10-2019, 07:18 AM

Quote:

Originally Posted by dts3

Turning on the heater brings down the water/coolant temp, not the oil.

There is an internal oil/water heat exchanger that uses the thermostatically controlled temperature of the coolant to stabilize the oil temperature. It also serves to raise the oil temperature as quickly as possible, since the coolant on a cold-started engine heats up more quickly than the oil. When I set the heater to full blast and reduce engine RPM I do see a slow decline in the oil temperature.

As another person mentioned, 220 deg F may not be catastrophically high but it is on the borderline of my comfort zone for my peace of mind when it comes to protecting the engine from heat damage.

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03-09-2019, 06:13 PM	#1 (permalink)
dts3 Track Member Join Date: May 2018 Location: Farmington Hills, MI Posts: 599 Drives: 08 Expedition Rep Power: 6767	Turning on the heater brings down the water/coolant temp, not the oil.