2011 Ford F350 Super Duty Crew Cab Owner Guide 4th Printing - Page 391

Maintenance and Specifications • You may want to turn off the speed control in hilly terrain if unnecessary shifting between the top gears occurs. Unnecessary shifting of this type could result in reduced fuel economy. • Warming up a vehicle on cold mornings is not required and may reduce fuel economy. • Resting your foot on the brake pedal while driving may reduce fuel economy. • Combine errands and minimize stop-and-go driving. Maintenance • Keep tires properly inflated and use only recommended size. • Operating a vehicle with the wheels out of alignment will reduce fuel economy. • Use recommended engine oil. Refer to Maintenance product specifications and capacities in this chapter. • Perform all regularly scheduled maintenance items. Follow the recommended maintenance schedule and owner maintenance checks found in scheduled maintenance information. Conditions • Heavily loading a vehicle or towing a trailer 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. • To maximize the fuel economy, drive with the tonneau cover installed (if equipped). • 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. • Four-wheel-drive operation (if equipped) is less fuel efficient than two-wheel-drive operation. 391 2011 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)