METHYLCYCLOPENTADIENYL
MANGANESE TRICARBONYL (MMT)
IN GASOLINE
MMT is a manganese-containing metallic additive that
is blended into some gasolines 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 perfor-
mance in some vehicles. The manufacturer recom-
mends that gasoline without MMT be used in your
vehicle. The MMT content of gasoline may not be indi-
cated on the gasoline pump; therefore, you should ask
your gasoline retailer whether the gasoline contains
MMT. MMT is prohibited in Federal and California refor-
mulated gasoline.
MATERIALS ADDED TO FUEL
Besides using unleaded gasoline with the proper
octane rating, gasolines that contain detergents, corro-
sion and stability additives are recommended. Using
gasolines that have these additives will help improve
fuel economy, reduce emissions, and maintain vehicle
performance.
Designated TOP TIER Detergent Gasoline
contains a higher level of detergents to fur-
ther aide in minimizing engine and fuel sys-
tem deposits. When available, the usage of TOP TIER
Detergent gasoline is recommended. Visit
www.toptiergas.com for a list of TOP TIER Detergent
Gasoline retailers.
Designated TOP TIER Detergent Gasoline contains a
higher level of detergents to further aide in minimizing
engine and fuel system deposits. When available, the
usage of Top Tier Detergent gasoline is recommended.
Visit www.toptiergas.com, at the link below, for a list of
TOP TIER Detergent Gasoline retailers.
Indiscriminate use of fuel system cleaning agents
should be avoided. Many of these materials intended
for gum and varnish removal may contain active sol-
vents or similar ingredients. These can harm fuel sys-
tem gasket and diaphragm materials.
FUEL SYSTEM CAUTIONS
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•
The use of leaded gasoline is prohibited by Federal
law. Using leaded gasoline can impair engine per-
formance and damage the emissions control
system.
•
An out-of-tune engine or certain fuel or ignition
malfunctions can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune
or malfunctioning and may require immediate ser-
vice. Contact an authorized dealer for service
assistance.
•
The use of fuel additives, which are now being sold
as octane enhancers, is not recommended. Most
of these products contain high concentrations of
methanol. Fuel system damage or vehicle perfor-
mance problems resulting from the use of such
fuels or additives is not the responsibility of the
manufacturer and may void or not be covered
under the New Vehicle Limited Warranty.
NOTE:
Intentional tampering with the emissions control system
can result in civil penalties being assessed against you.
TECHNICAL SPECIFICATIONS 225
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