I don't run my Z on the track nor do I intend to but do drive it like a sports car should be driven.Fast and furious!
Temperature 92 degrees and very humid here in N J and drove the car for a half an hour at 80 mph and oil temp never went above 225! I assume if I were reving at high rpm's going through the gears upshifting and downshifting and manuevering turns quite a bit it would rise considerably.
So it is my belief that for moderate street use in the summer it will be fine.All this talk about a cooler should only be needed on a car that will be taken to the track.Just my 2 cents for what its worth.
By the way I dumped the ester oil and filter at 2800 miles and used Mobil 5-30 from here on in.Engine quiet as before and don't hear a thing!Topped it off and will watch oil consumption from here on in.
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