TECHNICAL SPECIFICATIONS 505
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 manufacturer and may void or not
be covered under the New Vehicle Limited Warranty.
MMT In Gasoline
Methylcyclopentadienyl Manganese Tricarbonyl (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 gaso
-
line retailer whether the gasoline contains MMT. MMT is
p
roh
ibited in Federal law and California reformulated gaso-
line.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
perf
ormance:
• The use of leaded gasoline is prohibited by Federal
law
. Using leaded gasoline can impair engine perfor-
mance and damage the emissions control system.
• A
n out-of-tune engine, certain fuel or ignition malfunc-
tion
s can cause the catalytic converter to overheat. If
you not
ice a pungent burning odor or some light
smoke, your engine may be out-of-tune or malfunc
-
tioning and may require immediate service. Contact an
auth
orized dealer for service assistance.
• The use of fuel additives, which are now being sold as
octa
ne enhancers, is not recommended. Most of these
products contain high concentrations of methanol. Fuel
system damage or vehicle performance 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.
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