See also:

Closing the windows and glass sunroof/panoramic glass sunroof
Driving with the glass sunroof/panoramic glass sunroof and windows open results in increased air resistance and raises fuel consumption. ...

Going & Stopping
You'd never suspect the X5 M is powered by a 555-hp V-8 if you were simply riding along running errands, because it behaves like any luxury crossover would in that situation. Acceleration from a s ...

Remove unnecessary cargo
Additional weight increases fuel consumption. ...