Originally Posted by car_fan
Understandable with the ever increasing stringent regulations auto manufacturers face "today". I was speaking circa 2007 when the S65 was introduced in the E92 ///M3. As is the case with the S85 these engines are not models of fuel efficiency.
Ironically emission stringency and controls have little or nothin to do with mileage! Ironic to me. The modern engine, including the S65 is VERY "clean" in terms of pollution it puts out relative to older engines.
It doesnt take into account, aside from a gas guzzler tax, the fact that the amount of fuel it goes through probalby negates the cleaner burning cause you burn 3 times more!