To be meaningful, we need to know how the guy did with the predecessor engine under the same circumstances. Also, the mpg result had to have been calibrated. And the eco features (start/stop, etc.) can be put on any engine, so those benefits need to be factored out of the equation.
Originally Posted by ningster
My friend who drives the F30 says he gets close to 40 mpg when cruising on the freeway at 75 mph... there are some new features, such as engine shut down at stop lights, economy setting (eco, comfort, sport) which seems to keep the car at a higher gear (noticeably slower pick up)...
2014 535d, M Sport, Space Gray/Mocha Nappa
2007 530i, White/Black, 6MT
2001 530i, Orient Blue/Beige, 5MT
1994 325is, White/Black 5MT
1984 325e, White/Black 5MT
1983 318i, Delphin/Beige 4MT