1999 Ford F150 SVT Supplement 1st Printing - Page 13

Maintenance OCTANE RECOMMENDATIONS Your vehicle is designed to use "Premium" unleaded gasoline with an (R+M)/2 octane rating of 91 or higher for optimum performance. (R+M)/2 METHOD The use of gasolines with lower octane ratings may degrade performance. We do not recommend the use of gasolines labeled as "Premium" in high altitude areas that are sold with octane ratings of less than 91. If your engine knocks under any driving conditions while you are using fuel with the recommended octane rating, see your dealer or a qualified service technician to prevent any engine damage. 91 WHEELS AND TIRES Tires Wheels 295/45 ZR 18 BSW tires SVT-Signature style, 18 in x 9.5 in aluminum 5-spoke wheels TIRE ROTATION • Unidirectional tire rotation For vehicles equipped with unidirectional tires and full-size spare, your vehicle can be driven with the unidirectional full-size spare, rotating counter to the directional arrow on the tire sidewall. Your unidirectional full-size spare tire is rotated for wear balance. Best performance may be achieved by remounting the tire to the wheel, if necessary, to permit tire rotation with the directional arrow on the tire sidewall. SPARE TIRE AND WHEEL Your vehicle is equipped a 235/70R-16 spare tire on a steel wheel rim. This is for temporary use only. Replace this spare tire with a repaired road tire as soon as possible. 13