2009 JEEP GRAND CHEROKEE fuel additives

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 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 if the
gasoline contains MMT.
It is even more important to look for gasoline without
MMT in Canada, because MMT can be used at levels
higher than those allowed in the United States.
MMT is prohibited in Federal and California reformu-
lated gasoline.
Materials Added To Fuel
All gasoline sold in the United States is required to
contain effective detergent additives. Use of additional
detergents or other additives is not needed under normalconditions and would result in additional cost. Therefore,
you should not have to add anything to the fuel.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine performance
and damage the emission 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 service.
Contact your authorized dealer for service assistance.
358 STARTING AND OPERATING

•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 performance problems
resulting from the use of such fuels or additives is not
the responsibility of the manufacturer.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
Carbon Monoxide Warnings
WARNING!
Carbon monoxide (CO) in exhaust gases is deadly.
Follow the precautions below to prevent carbon
monoxide poisoning.
•Do not inhale exhaust gases. They contain carbon
monoxide, a colorless and odorless gas which can kill.Never run the engine in a closed area, such as a
garage, and never sit in a parked vehicle with the
engine running for an extended period. If the vehicle is
stopped in an open area with the engine running for
more than a short period, adjust the ventilation system
to force fresh, outside air into the vehicle.
•Guard against carbon monoxide with proper mainte-
nance. Have the exhaust system inspected every time
the vehicle is raised. Have any abnormal conditions
repaired promptly. Until repaired, drive with all side
windows fully open.
•Keep the liftgate closed when driving your vehicle to
prevent carbon monoxide and other poisonous ex-
haust gases from entering the vehicle.
STARTING AND OPERATING 359
5

ABS (Anti-Lock Brake System).............. 309
Adding Fuel........................... 364
Adjustable Pedals....................... 143
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 417
Air Conditioner Maintenance............... 419
Air Conditioning........................ 264
Air Conditioning, Operating Tips............ 271
Air Conditioning Refrigerant............... 420
Air Conditioning System.................. 264
Air Filter.............................. 417
Air Pressure, Tires....................... 336
Airbag................................ 46
Airbag Deployment....................... 53
Airbag Light.......................56,71,186
Airbag Maintenance....................... 55
Alarm, Panic............................ 25
Alarm (Security Alarm).................20,187
Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 253Antifreeze (Engine Coolant)................ 456
Anti-Lock Brake System (ABS)............309,312
Anti-Lock Warning Light.................. 186
Anti-Theft System....................... 187
Appearance Care........................ 436
Arming Theft System (Security Alarm)......... 20
Assist, Hill Start........................ 320
Assistance Towing........................ 97
Auto Down Power Windows................ 32
Automatic Dimming Mirror................. 78
Automatic Door Locks..................... 30
Automatic Headlights.................... 131
Automatic Temperature Control (ATC)......... 264
Automatic Transmission................288,433
Adding Fluid......................... 435
Fluid and Filter Changes................. 433
Fluid Level Check..................... 434
Fluid Type........................... 433
Special Additives...................... 433
498 INDEX