Like I said, you all know more about these cars than i do for sure. I get all my cars tuned, but i am not a code monkey, though i love reading all the information i find here. Steve99 you definitely have words of wisdom.
But, my posts intent was just to make all the information simple to the average driver. In other words dont over think it. You will know when an oil cooler is needed. I am about to pick up my 4th BRZ (no the other 3 didnt die because i refused to buy an oil cooler, quite the contrary) and the first thing going on it will likely be my JR radiator/oil cooler combo. In fact its sitting in a box on the floor waiting for my 17 BRZ to be delivered. I know i need an oil cooler.
I dont know what tables are in the ECU, and I can not claim to know anything about the process. But, what i do know with multiple BRZs i have tracked....is that the car will let you know the minute its not happy. Once i see oil temps around 315F give or take the car cuts revs. You will know it when it happens. And that means take a cool down lap or two and its time to go park. There are many factors with this, that track guys will likely have learned. As far as oil weight, and interval to change and so forth. Luckily this car is the easiest oil change in the world. My wife thinks it is still work, when i go out do it. But she doesnt know that changing oil on this car is something i find fun and relaxing. It gives me about an hour to myself in the garage.
But for a new-ish guy i was just trying to say dont think you can't go turn some laps without an oil cooler. That, the car will let you know if you need an oil cooler. That being said, because the BRZ runs such lite oil, and the oil temps can get high fast in stock form. Having some way to monitor oil is a great idea in this car if you plan on hitting anything longer than an AX.
So, again I am no expert. But, new guys dont get overwhelmed with the knowledge shared. Just take it in and keep it in mind. You will know when its time for an oil cooler, it literally is the first thing i would buy for my twin. But, if you are not on the track I dont think you would need one.