I have seen 270F on mine driving it hard on the Autobahn but that was expected at high speeds. Thermostat is set to maintain 240F and does a pretty good job on my car year round. Does take longer to warm the oil up when colder out but I seldom see above 250F even on hot days at highway speeds as had been reported above. I discovered BMW didn't add the aux cooler since I am not sport so I purchased it and had them add it once the car was back in the US...
You are good to go...
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