Quote:
Originally Posted by engatwork
write up on variable displacement oil pumps
I was quite surprised how much it improves fuel economy and that the ECM can tell you are not running the correct viscosity. There are going to be a lot of second owners that don't quite understand the importance of good and frequent oil changes that are going to be severely disappointed.
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This same oil pump is used on chev cruze turbo engines, and a lot failures happen after a few jiffy lube jobs.
The cool bit about the BMW is that the oil level sensor measures quality and temperature too - so the ECU knows what to set the oil pump drive to and measures the pressure and temperature after the pump also.