Quote:
Originally Posted by Phil325i
I think you'll find the gauge in the E92 measures oil temp, not water. Oil temp does not fluctuate like the water temp. My understanding (as has already been said) is that water temp is not displayed because the water pump speed (and thereby engine water temp) varies according to driving conditions. So the gauge would be varying wildly and causing owners unnecessary panic.
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Then why does the coolant temp gauge in my N52-powered Z4 not fluctuate? Besides engine cooling systems keep the engine at the peak temperature for emissions and fuel consumption.