1997 Ford Aerostar Owner's Manual - Page 268

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. Emission Control System Your vehicle is equipped with a catalytic converter which enables your vehicle to comply with applicable exhaust emission requirements. To make sure that the catalytic converter and the other emission control parts continue to work properly: u Use only unleaded fuel. u Avoid running out of fuel. u Do not turn off the ignition while your vehicle is moving, especially at high speeds. Schedule booklet performed according to the specified schedule. u Have the services listed in your Maintenance 269