Jeep Grand Cherokee User Manual page 82

Do not use gasolines containing Methanol.
Use of methanol/gasoline blends may result in
starting and driveability problems and damage
critical fuel system components.
Problems that are the result of using methanol/
gasoline blends are not the responsibility of the
manufacture and may not be covered by the new
vehicle warranty.
Clean Air Gasoline
Many gasolines are now being blended that con-
tribute 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 gasoline."
The manufacture supports these efforts toward
cleaner air. You can help by using these blends as
they become available.
Materials Added to Fuel
Indiscriminate use of fuel system cleaning agents
should be avoided. Many of these materials in-
tended for gum and varnish removal may contain
active solvents or similar ingredients. These can
harm fuel system gasket and diaphragm materi-
als.
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FUEL REQUIREMENTS — DIESEL
Diesel fuels are available from most reputable fuel
marketers. We encourage you to use only the best
quality fuel with a calculated Cetane Index of 45 or
higher. See your authorized dealer or distributor
for further information regarding fuels available in
your area.
In areas where diesel fuel is below the recom-
mended quality levels (high levels of sulfur and
water) it is critical to monitor the fuel filter for
contamination and the "Water-In-Fuel Warning
Light" in the instrument cluster. Failure to properly
service the fuel system for these items can signifi-
cantly reduce engine life and lead to major engine
repair. More frequent service intervals of the fuel
filter/water separator unit may be required under
these conditions than those shown in "Mainte-
nance Schedule A or B." See your authorized
dealer or distributor for specific information.
NOTE:
When the "Water-In-Fuel Warning Light" in the
instrument cluster comes on, the fuel filter/
water separator assembly must be drained.
Refer to "Maintaining Your Vehicle" for the
proper procedure
FUEL TANK FILLER CAP (GAS CAP)
WARNING!
To avoid fuel spillage and overfilling, do not "top
off" the fuel tank after filling.
The locking fuel cap is located behind the fuel
filler door, on the left side of the vehicle. If the fuel
cap is lost or damaged, be sure the replacement
cap has been designed for use with this vehicle.
CAUTION!
Damage to the fuel system or emission control
system could result from using an improper fuel
cap. A poorly fitting cap could let impurities into
the fuel system.