Ethanol; Clean Air Gasoline; Mmt In Gasoline; Materials Added To Fuel - Jeep Cherokee Operating Information Manual

MTBE is an oxygenate made from methanol, it
does not have the negative effects of methanol.
CAUTION!
Do not use gasolines containing methanol or
E-85 ethanol. Use of these blends may result
in starting and driveability problems and may
damage critical fuel system components.

Ethanol

The manufacturer recommends that your ve-
hicle be operated on fuel containing no more
than 10% ethanol. Purchasing your fuel from a
reputable supplier may reduce the risk of ex-
ceeding this 10% limit and/or of receiving fuel
with abnormal properties. It should also be
noted that an increase in fuel consumption
should be expected when using ethanol-
blended fuels, due to the lower energy content
of ethanol. Problems that result from using
methanol/gasoline or E-85 ethanol blends are
not the responsibility of the manufacturer. While
MTBE is an oxygenate made from methanol, it
does not have the negative effects of methanol.
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CAUTION!
Use of fuel with ethanol content higher than
10% may result in engine malfunction, starting
and operating difficulties, and materials deg-
radation. These adverse effects could result in
permanent damage to your vehicle.

Clean Air Gasoline

Many gasolines are now being blended to
contribute to cleaner air, especially in those
areas where air pollution levels are high. These
new blends provide a cleaner burning fuel and
some are referred to as "reformulated gaso-
line."
The manufacturer supports these efforts toward
cleaner air. You can help by using these blends
as they become available.

MMT in Gasoline

MMT is a manganese containing metallic addi-
tive 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 emission system
performance in some vehicles. The manufac-
turer 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 or not his/her gasoline contains
MMT.

Materials Added to Fuel

Besides using unleaded gasoline with the
proper octane rating, gasolines that contain
detergents, corrosion and stability additives
are recommended. Using gasolines that have
these additives will help improve fuel economy,
reduce emissions, and maintain vehicle perfor-
mance.
Indiscriminate use of fuel system cleaning
agents should be avoided. Many of these ma-
terials intended for gum and varnish removal
may contain active solvents or similar ingredi-
ents. These can harm fuel system gasket and
diaphragm materials.