Calm and smooth driving 
Consistency is more important than speed. The more smoothly you drive, the less fuel the vehicle 
consumes. 
When driving on the highway or freeway, a constant, moderate speed is more efficient and economical 
than constantly accelerating and braking. Usually you can reach your destination just as quickly by 
driving at a moderate, but steady speed. 
The cruise control system can assist in maintaining a uniform driving style. 
Moderate use of extra electrical loads 
Comfort inside the vehicle is nice and important, but it is important to use them in an environmentally 
conscious manner. 
Some devices can increase fuel consumption when activated (examples): 
 x Climate control system (air conditioner): If the climate control system has to produce starkly 
contrasting temperatures, it requires a large amount of energy, which is generated by the engine. The 
temperature in the vehicle should therefore not be extremely different from that of the outside 
temperature. It may be helpful to ventilate the vehicle before driving and then to drive a short distance 
with the windows open. After that, switch on the air conditioner with the windows closed. Keep the 
windows closed when driving at high speeds. Open windows increase fuel consumption. 
 x Switch off seat heating once it has served its purpose. 
 x Switch off the rear window defroster as soon as the windows are free of fog and ice. 
Additional factors that increase fuel consumption (examples): 
 x Malfunctioning engine control. 
 x Driving in the mountains. 
 x Towing a trailer. 
  NOTICE 
Never let the vehicle coast or roll down a hill in Neutral (N), especially when the engine is not 
running. The transmission will not be lubricated and will be damaged. 
Fuel-efficient driving 
 
Fig. 147 Fuel consumption in mpg at 2 different outside air temperatures.