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283
FUEL REQUIREMENTS
This engine is designed to meet all emis-
sion regulations, and provide satisfac-
tory fuel economy and performance
when using high-quality unleaded
“Regular” gasoline having a posted octane number
of 87 as specified by the (R+M)/2 method. For
optimal performance the use of 91 or higher octane
“Premium” gasoline is recommended in these
engines.
While operating on gasoline with the required
octane number, hearing a light knocking
sound from the engine is not a cause for
concern. However, if the engine is heard
making a heavy knocking sound, see a dealer
immediately. Use of gasoline with a lower than
recommended octane number can cause
engine failure and may void or not be covered
by the New Vehicle Limited Warranty.
Poor quality gasoline can cause problems
such as hard starting, stalling, and hesitations.
If you experience these symptoms, try another
brand of gasoline before considering service
for the vehicle.
Reformulated Gasoline
Many areas of the country require the use of
cleaner burning gasoline referred to as “Refor-
mulated Gasoline”. Reformulated gasoline
contains oxygenates and are specifically
blended to reduce vehicle emissions and
improve air quality.
The use of reformulated gasoline is recom-
mended. Properly blended reformulated gaso-
line will provide improved performance and
durability of engine and fuel system compo-
nents.
Gasoline/Oxygenate Blends
Some fuel suppliers blend unleaded gasoline
with oxygenates such as ethanol.
Problems that result from using gasoline
containing more than 15% ethanol (E-15) or
gasoline containing methanol are not the
responsibility of the manufacturer and may
void or not be covered under New Vehicle
Limited Warranty.
CNG And LP Fuel System Modifications
Modifications that allow the engine to run on
Compressed Natural Gas (CNG) or Liquid
Propane (LP) may result in damage to the
engine, emissions, and fuel system compo-
nents. Problems that result from running CNG
or LP are not the responsibility of the manufac-
turer and may void or not be covered under the
New Vehicle Limited Warranty.
MMT In Gasoline
Methylcyclopentadienyl Manganese Tricar-
bonyl (MMT) is a manganese-containing
metallic additive that is blended into some
gasoline to increase octane. Gasoline blended
with MMT provides no performance advantage
beyond gasoline of the same octane number
without MMT. Gasoline blended with MMT
reduces spark plug life and reduces emissions
system performance in some vehicles. The
manufacturer recommends that gasoline
without MMT be used in your vehicle. The MMT
content of gasoline may not be indicated on
the gasoline pump; therefore, you should ask
your gasoline retailer whether the gasoline
contains MMT. MMT is prohibited in Federal
and California reformulated gasoline.
CAUTION!
DO NOT use E-85, gasoline containing
methanol, or gasoline containing more than
15% ethanol (E-15). Use of these blends
may result in starting and drivability
problems, damage critical fuel system
components, cause emissions to exceed
the applicable standard, and/or cause the
Malfunction Indicator Light to illuminate.
Please observe pump labels as they should
clearly communicate if a fuel contains
greater than 15% ethanol (E-15).
20_GA_OM_EN_USC_t.book Page 283
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