stock oil heat exchanger from NA8/NB effectiveness?
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Junior Member
Joined: Jun 2016
Posts: 67
Total Cats: 4
From: Novi-ish, Michigan
On my current build I chose not to use the factory heat exchanger because the coolant lines are a liability. Instead, I'm using the FM/Setrab cooler. I also installed the small GM temp sensor in the pan so I can log the oil temps. What I have found is that the oil comes up to temp fairly quickly. Nearly as quick as the coolant so there is not much benefit from the heat exchanger in that regard on a turbo application. The factory unit is probably engineered correctly as far as the ratio of water to oil volume since the heat transfer rate of the coolant is much higher then the oil. I would save up for an oil cooler instead of running the factory exchanger.
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I ditched the factory oil warmer as there is hardly enough reason to keep it, too many failure points. I have a pan mounted temp sensor, and a 190* cooler thermostat with a small 10 row radiator and use T6. It is literally perfect for a street car that plays in the mountains, a dual duty car, and so on. When I drive the car hard in the mountains and sliding around it is stable around 200-215. Normal driving with spirited-ness hear and there the oil temp is where it would be without the cooler(~180) as the T-stat is typically closed. So really it's not quite necessary but is a nice safety and prolongs my oil health,
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Junior Member
Joined: Jul 2016
Posts: 431
Total Cats: 76
From: Orlando, FL
(1). "excessive degradation" You are doing Blackstone oil analysis testing to see "degradation" correct?
(2). "Does the oil need to be above 280 to justify wanting lower oil temperatures? No not really, however no reason to worry about it till you hit that on track.
If your at 20 PSI on highway with T6 you might have other problems. Have to assume your water isn't sitting at 240"? What is the pressure at 6K under load? That's a better measure.
T6 is an OK oil, not fantastic after formula change but OK. Starts fairly thin although It doesn't loose viscosity with breakdown very fast and is fairly thermal viscosity stable.
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