2010 JEEP GRAND CHEROKEE octane

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
6.1L Engine
The 6.1L engine is designed to meet all
emissions regulations and provide excel-
lent fuel economy and performance when
using high-quality premium unleaded
gasoline with an octane rating of 91 or
higher.
Light spark knock at low engine speeds is not harmful to
your engine. However, continued heavy spark knock at
high speeds can cause damage and immediate service is
required. Poor quality gasoline can cause problems such
as hard starting, stalling, and hesitations. If you experi-
ence these symptoms, try another brand of gasoline
before considering service for the vehicle.
282 STARTING AND OPERATING

E85 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 E85
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 driveability
•increased risk for fuel system component corrosion
To fix a Non-FFV vehicle inadvertently fueled once with
E85 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 E85 fuel.
MMT In Gasoline
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 gasoline retailer whether
the gasoline contains MMT. It is even more important to
look for gasoline without MMT in Canada, because MMT
284 STARTING AND OPERATING

can be used at levels higher than those allowed in the
United States. MMT is prohibited in Federal and Califor-
nia reformulated 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 normal
conditions and they 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:(Continued)
CAUTION! (Continued)
•The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine perfor-
mance and damage the emissions 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.
•The use of fuel additives, which are now being
sold as octane enhancers, is not recommended.
Most of these products contain high concentra-
tions 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.
5
STARTING AND OPERATING 285

FLUIDS, LUBRICANTS, AND GENUINE PARTS
Engine
ComponentFluid, Lubricant, or Genuine Part
Engine Coolant MOPARAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hy-
brid Organic Additive Technology) or equivalent.
Engine Oil For best performance and maximum protection under all types of operat-
ing conditions, the manufacturer only recommends full synthetic engine
oils that meet the requirements of Chrysler Material Standard MS-10725
and are approved to MB 229.3 or MB 229.5. The manufacturer recom-
mends the use of a full synthetic 5W–40 or equivalent engine oil.
Engine Oil Filter MOPAREngine Oil Filter or equivalent.
Spark Plugs PLZTR5A – 13 (Gap 0.040 in [1.01 mm])
Fuel Selection Premium Unleaded 91 Octane Only or Higher.
356 MAINTAINING YOUR VEHICLE

Fluid Leaks............................. 73
Fluid Level Checks Brake .............................. 334
Cooling System ....................... 328
Engine Oil ........................... 318
Power Steering ........................ 249
Fluids, Lubricants and Genuine Parts .......... 356
Fog Light Service ........................ 352
Fog Lights ....................... 105,165,352
Folding Rear Seat ........................ 91
Four-Way Hazard Flasher .................. 302
Freeing A Stuck Vehicle ................... 244
Front Heated Seats ....................... 88
Fuel ................................. 282
Additives ............................ 285
Clean Air ............................ 283
Ethanol ............................. 283
Filler Cap (Gas Cap) .................... 287
Gasoline ............................ 282 Gauge
.............................. 165
Materials Added ....................... 285
Methanol ............................ 283
Octane Rating ........................ 282
Requirements ...................... 282,355
Tank Capacity ........................ 355
Fuel System Caution ..................... 287
Fuses ................................ 341
Garage Door Opener (HomeLink) ........... 128
Gas Cap (Fuel Filler Cap) ............287,288,314
Gasoline, Clean Air ...................... 283
Gasoline (Fuel) ......................... 282
Gasoline, Reformulated ................... 283
Gauges Coolant Temperature ................... 162
Fuel ............................... 165
Speedometer ......................... 156
Tachometer .......................... 159
10
INDEX 393

Multi-Function Control Lever............... 100
New Vehicle Break-In Period ................ 70
Occupant Restraints ................... 34,51,55
Occupant Restraints (Sedan) .............48,51,54
Octane Rating, Gasoline (Fuel) .............. 282
Odometer .......................... 163,164
Trip ................................ 163
Oil, Engine ............................ 318
Capacity ............................ 355
Change Interval ....................... 319
Checking ............................ 318
Disposal ............................ 321
Filter ............................... 321
Filter Disposal ........................ 321
Materials Added to ..................... 320
Pressure Warning Light .................. 160
Recommendation ................... 319,355Viscosity
............................ 355
Onboard Diagnostic System ..............314,315
Opener, Garage Door (HomeLink) ........... 128
Operator Manual (Owner’s Manual) ............ 5
Outside Rearview Mirrors .................. 81
Overhead Console ....................... 127
Overheating, Engine ................... 162,302
Owner’s Manual (Operator Manual) .........5,383
Paint Care ............................. 336
Paint Damage .......................... 336
Panic Alarm ............................ 22
Park Sense System, Rear ................... 119
Parking Brake .......................... 250
Passing Light ........................... 106
Pedals, Adjustable ....................... 114
Personal Settings ........................ 179
Pets .................................. 70
Pets, Transporting ........................ 70
398 INDEX