2007 Ford F250 Owner Guide 2nd Printing - Page 76

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. Compass display The compass heading is displayed as one of N, NE, E, SE, S, SW, W and NW in the message center display. The compass reading may be affected when you drive near large buildings, bridges, power lines and powerful broadcast antenna. Magnetic or metallic objects placed in, on or near the vehicle may also affect compass accuracy. Usually, when something affects the compass readings, the compass will correct itself after a few days of operating your vehicle in normal conditions. If the compass still appears to be inaccurate, a manual calibration may be necessary. Refer to Compass zone/calibration adjustment. Most geographic areas (zones) have a magnetic north compass point that varies slightly from the northerly direction on maps. This variation is four degrees between adjacent zones and will become noticeable as the vehicle crosses multiple zones. A correct zone setting will eliminate this error. Refer to Compass zone/calibration adjustment. 76 2007 F-250/350/450/550 (f23) Owners Guide (post-2002-fmt) USA (fus)