Lighten your load
Carrying excess weight in a vehicle increases fuel consumption as your car has to work harder to accelerate. Remove heavy objects and clear your boot of unnecessary items, so you can travel as lightly as possible.
Remove roof boxes and racks if not being used
Remove roof boxes and racks if not being used. Car designers strive to make their vehicles as aerodynamic as possible, adding a roof box or rack spoils this by increasing drag on your car, making your engine work harder and increasing fuel usage, particularly at high speeds.