I don't have an oil cooler and I've done some seriously "spirited" driving, auto crossing, ect... I watched the gauge the entire time and while I was pushing the car pretty hard.
Temps never got higher than 240-ish... as soon as I would drop the revs for a cool down lap they would drop to 200-220ish.
This was all in about 55*F weather,but I foresee an issue come summer time.
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