FWIW, I used to do track events in my C6 corvettes and would watch oil temps. The computer will not through the engine into limp due to oil temps until they reach about 305 degrees. I've seen as high as 300 on a 100+ degree day about 15 minutes into a 20 minute session on that car. Base C6, no oil cooler.
Now that type of situation on a large bearing pontiac engine is going to create more heat, but my broader point is that the engine protection strategy of the GM as delivered computer doesn't kick in until above 300 degrees for the oil they recommend (mobile 10/30). So normalized temps in the low 200's are fine. If you're consistently seeing temps at or about 250 you just want to change the oil at earlier intervals.
My example above would be fairly extreme for most of us here with out cars, but it's understood that if you're at a track event like that, it gets a fresh fill before and after the event.
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-Jason
1969 Pontiac Firebird
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