Quote:
Originally Posted by upallnight
My point is that if you wanted to change the oil in your car at a different interval then what BMW specify, BMW maintenance program would not cover it. So if BMW schedule is 15,000 miles between oil change and the wife drives the x for short trips and have the car idling for long period of time, that would be considered harsh driving condition, but BMW will not alter their schedule for it.
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The BMW SII uses fuel consumption to calculate oil changes.
A vehicle used for short trips/extended idle will show an SII oil change required LONG before 15k miles are traveled.