Ford 2009 F-250 Owner's Manual page 139

Driver Controls
Average fuel economy (AFE)
Select this function from the INFO
menu to display your average fuel
economy in miles/gallon or
liters/100 km.
If you calculate your average fuel
economy by dividing miles traveled
since last fill-up by gallons of fuel used (multiply liters used by 100, then
divide by kilometers traveled), your figure may be different than
displayed for the following reasons:
• Your vehicle was not perfectly level during fill-up
• Differences in the automatic shut-off points on the fuel pumps at
service stations
• Variations in top-off procedure from one fill-up to another
• Rounding of the displayed values to the nearest 0.1 gallon (liter)
1. Drive the vehicle at least 5 miles (8 km) with the speed control
system engaged to display a stabilized average.
2. Record the highway fuel economy for future reference.
It is important to press the RESET control after setting the speed
control to get accurate highway fuel economy readings.
Drive timer (Elapsed travel timer)
Select this function from the INFO
menu to display a timer.
To operate the Trip Elapsed Drive
Time perform the following:
1. Press and release RESET in order
to start the timer.
2. Press and release RESET to pause the timer.
3. Press and hold RESET for two seconds in order to reset the timer.
139
2009 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)