On my 911, the oil temperature was all over depending on your driving. Lots of idling in traffic meant sky high oil temps. Super hard driving also meant high temps. Easy freeway driving meant lower temps.
The fastest way to warm the 911's oil was to let it idle for a couple minutes, then drive the car relatively easily for 10-12 kilometers, and then just a little harder for the next 10 kilometers. Oil was about 100C by then.
On my race bike, I had an oil temp gauge (in F) with a tell-tale so we could see the spike temperatures.
At Shannonville Speedway we saw 350F oil temps. One race and the oil was BEAT. Rarely did the temp fall below 300F.
1998 C230 "Black Betty"