1996 Ford Aerostar Owner's Manual - Page 259

4. Use these equations to calculate your fuel economy: (gallons used) u English: MPG = (total miles driven) Ö u Metric: L/100k = (100 x liters used) Ö (total kilometers driven) Comparisons With Environmental Protection Agency (EPA) and Transport Canada (TC) Fuel Economy Estimates EPA and TC fuel economy figures are obtained from laboratory tests under simulated road conditions and thus are estimates which may not reflect the actual conditions you experience or your personal style of driving. The EPA or TC fuel economy estimate is not a guarantee that you will achieve the fuel economy shown. The following decrease fuel economy: u Lack of regular, scheduled maintenance u Excessive speed u Rapid acceleration u Driving with your foot on the brake u Sudden stops u Extended engine idling u Using speed control in hilly terrain u Extended use of the A/C, defroster, rear window defroster and other accessories u Underinflated tires u Heavy loads u Aftermarket add-ons such as bike, ski or luggage racks, bug deflectors, etc. 281