Kzang it was meant to be driven in EcoPro and Sport+
They have gone to extreme lengths to make these cars as efficient and as aggressive performing as they can be. EcoPro affects everything from AC power, steering, downhill coasting, shift changes, to throttle sensitivity. Likewise, Sport+ even affects DSC. With BMW venturing into front wheel drive, producing the "i" line, and soon a 7 passenger people mover, we are likely to expect more versatility and efficiency features in all their cars, hold the M line.
You should post a Sport/Sport+ MPG for a meaningful distance. The more data points on behavior the better.