1999 Ford Ranger Owner Guide 1st Printing - Page 182

Maintenance and care powertrain damage, a loss of vehicle performance, and your warranty may be invalidated. Fuel quality It should not be necessary to add any aftermarket products to your fuel tank if you continue to use a high-quality fuel. Unleaded Gasoline engines If you are experiencing starting, rough idle or hesitation driveability problems during a cold start, try a different brand of "Regular" unleaded gasoline. "Premium" unleaded gasoline is not recommended (particularly in the United States) because it may cause these problems to become more pronounced. If the problems persist, see your dealer or a qualified service technician. The American Automobile Manufacturers Association (AAMA) issued a fuel specification to provide information on high quality fuels that optimize the performance of your vehicle. We recommend the use of fuels that meet the AAMA specification if they are available. FFV engine Your FFV will operate well on ordinary "Regular" unleaded gasoline, but only the highest quality fuel ethanol will provide the same level of protection and performance. If you are experiencing a rough or rolling idle after start-up with the outside temperature above 27° C (80° F), the idle should improve within 10 to 30 seconds. If the problems persist below this temperature, see your dealer or a qualified service technician. To assist fuel ethanol providers in meeting high fuel quality standards, the AAMA has published guidelines which prescribe "Ethanol Fuel Compatible" dispensing station equipment. To ensure proper operation of your FFV on fuel ethanol, refuel at stations certified by the AAMA. Cleaner air Ford approves the use of gasolines to improve air quality, including reformulated gasolines that contain oxygenates up to 10% ethanol or 15% MTBE. 182