Oil temperature hotter after once heated?

SouthArk370Z · 05-27-2022, 05:23 AM

My guess is that the oil has changed a little bit, from use, and is not transferring heat quite as well. Or it could be the filter has clogged up and is reducing flow through the system.

First thing I would do is change oil and filter. If that fixes the problem, I'd quit worrying about it. YMMV

If changing oil/filter doesn't work, I have no idea what the problem might be.

filip00 · 05-27-2022, 09:51 AM

Quote:

Originally Posted by SouthArk370Z

My guess is that the oil has changed a little bit, from use, and is not transferring heat quite as well. Or it could be the filter has clogged up and is reducing flow through the system.

First thing I would do is change oil and filter. If that fixes the problem, I'd quit worrying about it. YMMV

If changing oil/filter doesn't work, I have no idea what the problem might be.

Yes, that's what resolved the same exact symptoms last year. It was also after a track day, and also normal running temp was higher, and when I changed oil and filter, it was all back to normal again.

I suspect it's the same now, but what that tells me is that probably the oil isn't that good, or I managed to kinda destroy it.

Thanks!

THE BULL · 05-27-2022, 02:23 PM

Any oil cooler?

Technically after a spirited run oil should start seeing some fuel dilution.
An oil change to the same weight will confirm this.

Are you tuned?

Excessive rich AFRs will dump fuel into the crankcase and dilute the oil. Diluted oil will stay warmer.

Are you running a circulated catch can or stock PCV system?
If your PCV is open to atmosphere then vapors will hang in the crankcase exacerbating the problem.

A circulated system will be pulling some of those vapors out of the crank case.

Start with the changing of the oil along with putting this oil through the ringer and observe operating coolant temp oil temperatures.

You should start seeing higher oil temps over time.

05-27-2022, 05:23 AM	#1 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	My *guess* is that the oil has changed a little bit, from use, and is not transferring heat quite as well. Or it could be the filter has clogged up and is reducing flow through the system. First thing I would do is change oil and filter. If that fixes the problem, I'd quit worrying about it. YMMV If changing oil/filter doesn't work, I have no idea what the problem might be. JARblue, cv129 and filip00 like this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

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05-27-2022, 02:23 PM	#3 (permalink)
THE BULL Base Member Join Date: Apr 2021 Location: Florida Posts: 217 Drives: G37S Rep Power: 26848	Any oil cooler? Technically after a spirited run oil should start seeing some fuel dilution. An oil change to the same weight will confirm this. Are you tuned? Excessive rich AFRs will dump fuel into the crankcase and dilute the oil. Diluted oil will stay warmer. Are you running a circulated catch can or stock PCV system? If your PCV is open to atmosphere then vapors will hang in the crankcase exacerbating the problem. A circulated system will be pulling some of those vapors out of the crank case. Start with the changing of the oil along with putting this oil through the ringer and observe operating coolant temp oil temperatures. You should start seeing higher oil temps over time.