2009 JEEP GRAND CHEROKEE octane

be driven for up to 20 minutes above 15 mph (24 km/h)
in order for the TPMS to receive this information.
General Information
This device complies with part 15 of the FCC rules and
RSS 210 of Industry Canada. Operation is subject to the
following conditions:
•This device may not cause harmful interference.
•This device must accept any interference received,
including interference that may cause undesired
operation.
The tire pressure sensors are covered under one of the
following licenses:
United States.....................KR5S120123
Canada........................2671-S120123
FUEL REQUIREMENTS
3.7 and 4.7L Engine
All engines (except 5.7L engines) are de-
signed to meet all emissions regulations
and provide excellent fuel economy and
performance when using high-quality un-
leaded “regular” gasoline having an oc-
tane rating of 87. The use of premium
gasoline is not recommended, as it will not provide any
benefit over regular gasoline in these engines.
5.7L Engine
The 5.7L engine is designed to meet all
emissions regulations and provide satisfac-
tory fuel economy and performance when
using high-quality unleaded gasoline hav-
ing an octane range of 87 to 89. The manu-
facturer recommends the use of 89 octane
STARTING AND OPERATING 355
5

CAUTION!
DO NOT use gasoline containing Methanol. Use of
these blends may result in starting and drivability
problems and may damage critical fuel system com-
ponents.
Problems that result from using methanol/gasoline
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.
E-85 Usage In Non-Flex Fuel Vehicles
Non-FFV vehicles are compatible with gasoline contain-
ing 10% ethanol (E10). Gasoline with higher ethanol
content may void the vehicle’s warranty.
If a Non-FFV vehicle is inadvertently fueled with E-85
fuel, the engine will have some or all of these symptoms:
•operate in a lean mode
•OBD II “Malfunction Indicator Light” on
•poor engine performance
•poor cold start and cold drivability
•increased risk for fuel system component corrosion
To fix a Non-FFV vehicle inadvertently fueled once with
E-85 perform the following:
•drain the fuel tank (see your authorized dealer)
•change the engine oil and oil filter
•disconnect and reconnect the battery to reset the
engine controller memory
More extensive repairs will be required for prolonged
exposure to E-85 fuel.
MMT In Gasoline
MMT is a manganese containing metallic additive that is
blended into some gasoline to increase octane. Gasoline
STARTING AND OPERATING 357
5

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

CAUTION!
Only vehicles with the E-85 fuel filler cap (gas cap)
can operate on E-85.
ETHANOL FUEL (E-85)
E-85 is a mixture of approximately 85% fuel ethanol and
15% unleaded gasoline.
WARNING!
Ethanol vapors are extremely flammable and could
cause serious personal injury. Never have any smok-
ing materials lit in or near the vehicle when remov-
ing the fuel filler tube cap (gas cap) or filling the
tank. Do not use E-85 as a cleaning agent and never
use it near an open flame.
Fuel Requirements
If your vehicle is E-85 compatible, it will operate on
unleaded gasoline with an octane rating of 87, or E-85
fuel, or any mixture of these two fuels.
E-85 Badge
362 STARTING AND OPERATING

Component Fluid, Lubricant, or Genuine Part
Fuel Selection (3.7L and 4.7L Engine) 87 Octane
Fuel Selection (5.7L Engine) 87 Octane Acceptable - 89 Octane Recommended
Fuel Selection (3.0L Diesel Engine) Use good quality diesel fuel from a reputable supplier in your vehicle. The
manufacturer requires that you must fuel this vehicle with Ultra Low Sul-
fur Highway Diesel fuel (15 ppm Sulfur maximum) and prohibits the use
of Low Sulfur Highway Diesel fuel (500 ppm Sulfur maximum) to avoid
damage to the emissions control system. For most year-round service, No.
2 diesel fuel meeting ASTM specification D-975 Grade S15 will provide
good performance. If the vehicle is exposed to extreme cold (below 20F or
-7C), or is required to operate at colder-than-normal conditions for pro-
longed periods, use climatized No. 2 diesel fuel or dilute the No. 2 diesel
fuel with 50% No. 1 diesel fuel. This will provide better protection from
fuel gelling or wax-plugging of the fuel filters. This vehicle is fully compat-
ible with biodiesel blends up to 5% biodiesel meeting ASTM specification
D-975.
MAINTAINING YOUR VEHICLE 459
7

Fog Lights.......................135,192,453
Folding Rear Seat........................ 122
Four Wheel Drive....................... 296
Operation........................... 296
Systems............................. 296
Four Wheel Drive Operation................ 296
Four-Way Hazard Flasher.................. 390
Freeing A Stuck Vehicle................... 295
Front Axle (Differential)................... 431
Front Heated Seats....................... 118
Fuel................................. 355
Diesel.............................. 360
Filler Cap (Gas Cap).................... 364
Gasoline............................ 355
Gauge.............................. 192
Materials Added....................... 358
Octane Rating......................355,356
Requirements......................... 456
Tank Capacity........................ 456Fuel, Flexible.............See Flexible Fuel Vehicles
Fuel System Caution................358,365,367
Fuses................................ 441
Garage Door Opener (HomeLink) ........... 154
Gas Cap (Fuel Filler Cap)............364,366,410
Gasoline (Fuel)......................... 355
Gasoline, Reformulated................... 356
Gasoline/Oxygenate Blends................ 356
Gauges
Coolant Temperature................... 189
Fuel............................... 192
Speedometer......................... 184
Tachometer.......................... 187
Gear Ranges........................... 288
General Information...............20,26,110,355
Glass Cleaning.......................... 440
Glow Plug Light........................ 193
Gross Axle Weight Rating...............367,370
504 INDEX

Mopar Parts.........................413,492
Multi-Function Control Lever............... 130
New Vehicle Break-In Period................ 68
Occupant Restraints....................... 36
Octane Rating, Gasoline (Fuel)............355,356
Odometer..........................190,191
Trip ................................ 190
Off-Pavement Driving (Off-Road)..........302,436
Off-Road Driving (Off-Pavement)..........302,436
Oil Change Indicator..................... 198
Oil Change Indicator, Reset................. 198
Oil, Engine............................ 414
Capacity............................ 456
Change Interval....................... 414
Dipstick............................. 414
Disposal............................ 417
Filter............................... 417Filter Disposal........................ 417
Identification Logo..................... 415
Materials Added to..................... 417
Recommendation...................415,456
Synthetic............................ 417
Viscosity.........................416,456
Onboard Diagnostic System..............410,411
Opener, Garage Door (HomeLink) ........... 154
Operator Manual (Owner’s Manual)............ 6
Outside Rearview Mirrors.................. 79
Overdrive............................. 292
Overdrive OFF Switch.................... 292
Overhead Console....................... 153
Overheating, Engine...................189,390
Owner’s Manual (Operator Manual).........6,493
Paint Care............................. 436
Paint Damage.......................... 436
Panic Alarm............................ 25
INDEX 509
10