FORD 2012 F-550 v.3 - Manual (Page 43)

If you calculate your average fuel economy by dividing miles traveled by
gallons of fuel used (liters of fuel used by 100 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).
To determine your average highway fuel economy, do the following:
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 RESET in order to reset the function after
setting the speed control to get accurate highway fuel economy readings.
For more information refer to Essentials of good fuel economy in the
Maintenance and Specifications chapter.
Fuel Hist.: Press the right arrow key (when in the Fuel Econ. menu) to
reach Fuel Hist. Fuel history shows fuel usage (AVG MPG or L/100km)
as a bar graph based on time. The duration time can be changed as
follows:
Duration– Press the right arrow key (when in the Fuel Hist. menu) to
reach the following duration choices.
• 5 Minutes
• 10 Minutes
• 30 Minutes
• Last 5 Resets
Use the up/down arrows keys to highlight one of the choices; press and
hold OK to set your choice.
The graph is updated each minute with the fuel economy that was
achieved during the prior 5, 10, 30 minutes or last 5 resets of driving.
Instrument Cluster
43
2012 F-250/350/450/550 (f23)
Owners Guide, 3rd Printing
USA (fus)