Ford SVT F-150 Owner's Manual page 12

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.
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.
WHEELS AND TIRES
Tires
Wheels
TIRE ROTATION
Because your vehicle's tires perform
different jobs, they often wear
differently. To make sure your tires
wear evenly and last longer, rotate
them as indicated in the scheduled
maintenance guide. If you notice
that the tires wear unevenly, have
them checked.
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.
12
295/45 ZR 18 BSW tires
SVT-Signature style, 18 in x 9.5 in
aluminum 5-spoke wheels
91
(R+M)/2 METHOD