BMW corporate says the rationale is for gas mileage and driveability rather than reliability. I'd say it's a little bit of both.mchin said:Awsome !
Thanks for sharing as well.
I don't quite understand why with an M car they have to provide an option to reduce horsepower to 400. Afterall, if you did not want 500 horses all the time, why would you buy the M car to begin with.