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FWIW I always see temps of 270F-275F at the track with my '17, regardless of ambient temps. No oil cooler and not planning on one for my usage, which is 95% street with ~10-12 track days per year (consisting of 3-4x ~15-minute sessions per day). I run 5w30 synthetic. Currently at 70k miles and 48 track days.
Oil in the car now still looks remarkably "fresh" after ~2500 miles and 6 track days on this fill. Also, this is the first car I've ever dailied or tracked that seems to use NO oil whatsoever between changes. Even with the 6 track days thrown in it's still a bit above the "full" mark as it was when I checked it just after last oil change. Kind of amazing...
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