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Follow the recommended tire rotation frequency for your
type of driving found in the “Maintenance Schedules”
Section of this manual. More frequent rotation is permis-
sible if desired. The reasons for any rapid or unusual
wear should be corrected prior to rotation being per-
formed.
FUEL REQUIREMENTS
Your engine is designed to meet all emissions regulations
and provide excellent fuel economy and performance
when using high quality unleaded “regular” gasoline
having an octane rating of 87. The routine use of pre-
mium gasoline is not recommended. Under normal con-
ditions the use of premium fuel will not provide a benefit
over high quality regular gasolines and in some circum-
stances may result in poorer performance.
Light spark knock at low engine speeds is
not harmful to your engine. However, con-
tinued heavy spark knock at high speeds
can cause damage and immediate service
is required. Engine damage resulting from
operation with a heavy spark knock may
not be covered by the new vehicle warranty.
Poor quality gasoline can cause problems such as hard
starting, stalling and hesitations. If you experience these
symptoms, try another brand of “regular” gasoline be-
fore considering service for the vehicle.
Over 40 auto manufacturers world-wide have issued and
endorsed consistent gasoline specifications (the World-
wide Fuel Charter, WWFC) to define fuel properties
necessary to deliver enhanced emissions, performance
and durability for your vehicle. The manufacturer recom-
mends the use of gasolines that meet the WWFC speci-
fications if they are available.
Reformulated Gasoline
Many areas of the country require the use of cleaner
burning gasoline referred to as “Reformulated Gasoline.”
Reformulated gasolines contain oxygenates, and are spe-
cifically blended to reduce vehicle emissions and im-
prove air quality.
The manufacturer strongly supports the use of reformu-
lated gasolines. Properly blended reformulated gasolines
will provide excellent performance and durability for the
engine and fuel system components.
184 STARTING AND OPERATING