For what it's worth... results of semi-official GM testing below.
With help from Chevrolet (who built and own the modified 2015 Camaro SS being tested), Grassroots Motorsports was able to show how actual oil temperatures compare with those indicated on the factory 4-pack gauge. Testing was performed using the same equipment GM uses during their own testing (literally the same - GM sent it to them).
This testing was done at VIR at full bore with track times in the 2:12s, and since I was present that July weekend with my own Camaro, I can verify that ambient temps were HOT.
Note that the car in question is STOCK in terms of the oil system and DOES NOT have an aftermarket oil cooler.
Special thanks to Grassroots Motorsports for allowing me to share the attached pdf with the forum, and be sure to check out summaries of the other stories on their 2015 Camaro SS project track car
here. (Full stories are available in back issues.)