[ttimbo]

I suspect concern about how owners might read an oil temp gauge vs a coolant temp gauge is one of the reasons BMW has been reticent on this. I have both on another car, which runs "cool"; the coolant typically sits around 75-85C (it has a 75C thermostat) and the thermo fan kicks in at 85C. At a coolant temp of 85C u dear load, oil temperature is typically around 120C. This can be too hot for certain low grade oils but a high performance oil such as Motul easily copes with temps >150C (which I've never seen!)