Quote:
Originally Posted by Dezoris
It could be blowby going back into your PCV line if it is hard track time. This is also assuming you dont have a leak.
Make sure you are checking oil at same temps. After you do oil swap, check at certain temp. At track check oil at same temps.
As a general rule most cars operate best when oil temp is 230F or less on the track. Perrin did testing to show the ECU cuts timing when oil gets past 221F.
The issue is two fold, once your engine oil breaks that threshold, it will not stop climbing. No amount of load reduction will drop those temps until you shut down the engine.
Second issue is coolant, as the stock radiator is small it heat soaks fast. As your oil temp climbs your coolant temps will start to climb as well. Once they starting hitting the 220 range the cooling system is maxed out and your oil temps will continue to climb.
Thats stock threshold from my testing. What I can't tell you is how hot is too hot.
I would say if your coolant is cycling from 212-220F and your oil temps have exceeded 240F its time to back off and install at the very least an oil cooler.
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It's not so much blow by but oil vapor getting recirculated into the intake mani via the pcv. I've caught quite a bit of oil in my oil catch can (inline with pcv), but no scent of fuel that I could detect.