1996 Ford F250 Owner's Manual - Page 312

Choosing the Right Fuel NOTE: Read the 7.3L Diesel Engine Owner Guide Supplement for information regarding correct fuel requirements for your diesel-powered vehicle. Use only UNLEADED FUEL in your vehicle. Using leaded fuel is prohibited by federal law. Your warranty may not apply if your vehicle is damaged because you used the wrong fuel. Vehicle inspection programs may detect misfueling. Under these circumstances, you may be required by law to make costly repairs at your own expense. Octane recommendations Your vehicle is designed to use regular unleaded fuel with an octane rating of 87. In most cases, it is not necessary to use a fuel with an octane rating higher than 87. At service stations, the octane rating is displayed on a label on the pumps. Typical octane rating label In some parts of the country, "regular" grade fuels are sold with octane ratings of 86 or even less, especially in high altitude areas. We recommend that you do not use these fuels. Always use a fuel with an octane rating of 87, even if it is sold as a "midgrade" or "premium." 313