A lot if it is bull. If you do not race or track, there is no need for an oil cooler. I don't race or track. On the highway, I do take a 500 mile week end trip almost every week, I consistently drive at 75-80 with occasional bursts up to 115 and after my trips, the average shows I drove between 70-80 mph and the oil never crosses over 220, generally remains at 200 or below.
My friend has 80k on his 2013 Z and he drives similarly.
If you are on these forums, you can get convinced you need stuff that you can really do without.
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