I have an E89 N52 Z4 that I run at track events in Florida. The last event I ran it was 90+ degrees and I was seeing oil temps of 275 degrees F at the end of the straight. The engine etc. is completely stock. For reference My car has an added oil cooler. I used an N54 thermostat housing and plumbed a Setrab oil cooler in the same location as an N54 factory cooler. I even vented the inner fender well to get air flow through the cooler. How are you guys who track your cars keeping oil temps in a safe range?