Conditions

• Heavily loading a vehicle may reduce fuel economy at any speed.
• Carrying unnecessary weight may reduce fuel economy (approximately 1 mpg [0.4 km/L] is lost for every 400 lb [180 kg] of weight carried).
• Adding certain accessories to your vehicle (for example; bug deflectors, rollbars/light bars, running boards, ski/luggage racks) may reduce fuel economy.
• Using fuel blended with alcohol may lower fuel economy.
• Fuel economy may decrease with lower temperatures during the first 8–10 miles (12–16 km) of driving.
• Driving on flat terrain offers improved fuel economy as compared to driving on hilly terrain.
• Transmissions give their best fuel economy when operated in the top cruise gear and with steady pressure on the gas pedal.
• Close windows for high speed driving.
See also:
Reverse sensing system
The reverse sensing system (RSS) sounds a tone to warn the driver of
obstacles near the rear bumper when the R (Reverse) is selected and the
vehicle is moving at speeds less than 3 mph (5 km/h). T ...
Second generation (2003–2006)
The Navigator was updated in 2003, along with the Ford Expedition, on the new
Ford U platform. The interior was also substantially revised to bring it up to
the level expected by luxury buyers. So ...
Severe climates
If you drive in extremely cold climates:
• It may be necessary to increase the coolant concentration
above 50%.
• NEVER increase the coolant concentration above 60%.
• A coolant concentration of ...
