2013 JEEP GRAND CHEROKEE octane

FUEL REQUIREMENTS
3.6L Engine – If Equipped
This engine is designed to meet all emis-
sions regulations and provide excellent
fuel economy and performance when us-
ing high-quality unleaded “regular” gaso-
line having an octane 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 – If Equipped
This engine is designed to meet all emis-
sions regulations and provide satisfactory
fuel economy and performance when us-
ing high-quality unleaded gasoline having
an octane range of 87 to 89. The manufac-
turer recommends the use of 89 octane for optimumperformance. The use of premium gasoline is not recom-
mended, as it will not provide any benefit over regular
gasoline in these engines.
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.
Over 40 auto manufacturers worldwide have issued and
endorsed consistent gasoline specifications (the World-
wide Fuel Charter, WWFC) which define fuel properties
necessary to deliver enhanced emissions, performance,
and durability for your vehicle. The manufacturer recom-
mends the use of gasolines that meet the WWFC speci-
fications if they are available.
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STARTING AND OPERATING 541

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
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. MMT is prohibited in Federal
and California reformulated gasoline.
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STARTING AND OPERATING 543

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:
•The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine perfor-
mance and damage the emissions control system.
(Continued)
CAUTION!(Continued)
•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 ser-
vice. 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 concentrations
of methanol. Fuel system damage or vehicle perfor-
mance problems resulting from the use of such
fuels or additives is not the responsibility of the
manufacturer.
NOTE:Intentional tampering with the emissions control
system can result in civil penalties being assessed against
you.
544 STARTING AND OPERATING

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.
For best results, a refueling pattern that avoids alternat-
ing between E-85 and unleaded gasoline is recom-
mended.
E-85 Badge
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FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine
Component Fluid, Lubricant, or Genuine Part
Engine Coolant We recommend you use MOPAR® Antifreeze/Coolant 10 Year/150,000 Mile
Formula OAT (Organic Additive Technology).
Engine Oil – 3.6L Engine We recommend you use API Certified SAE 5W-20 Engine Oil, meeting the
requirements of Chrysler Material Standard MS-6395. Refer to your engine oil
filler cap for correct SAE grade.
Engine Oil – 5.7L Engine We recommend you use API Certified SAE 5W-20 Engine Oil, meeting the
requirements of Chrysler Material Standard MS-6395. Refer to your engine oil
filler cap for correct SAE grade.
Engine Oil Filter We recommend you use MOPAR® Engine Oil Filter or equivalent.
Spark Plugs – 3.6L Engine We recommend you use MOPAR® Spark Plugs (Gap 0.043 in [1.1 mm])
Spark Plugs – 5.7L Engine We recommend you use MOPAR® Spark Plugs (Gap 0.043 in [1.1 mm])
Fuel Selection – 3.6L Engine 87 Octane
Fuel Selection – 5.7L Engine 87 Octane Acceptable - 89 Octane Recommended
660 MAINTAINING YOUR VEHICLE

Four Wheel Drive Operation.................467
Freeing A Stuck Vehicle.....................597
Front Axle (Differential).....................634
Fuel...................................541
Adding..............................550
Additives............................544
Clean Air............................542
Conserving...........................330
Ethanol..............................542
Filler Cap (Gas Cap)....................550
Gasoline.............................541
Gauge...............................311
Light...............................325
Materials Added.......................544
Methanol............................542
Octane Rating.........................541
Requirements.........................541
Saver Mode...........................330
Tank Capacity.........................659Fuel, Flexible............................546
Fueling................................550
Fuel Optimizer...........................330
Fuel Saver..............................330
Fuel System Caution.......................551
Fuses..................................645
Garage Door Opener (HomeLink®)............260
Gas Cap (Fuel Filler Cap)...................550
Gasoline, Clean Air........................542
Gasoline (Fuel)...........................541
Conserving...........................330
Gasoline, Reformulated.....................542
Gauges
Coolant Temperature....................312
Fuel................................311
Speedometer..........................311
Tachometer
...........................303
Gear Ranges.............................449
688 INDEX

Power Door...........................35
Lubrication, Body.........................621
Maintenance Free Battery....................617
Maintenance Procedures....................612
Maintenance Schedule......................664
Malfunction Indicator Light (Check Engine).......303
Manual, Service..........................678
Memory Feature (Memory Seat)...............189
Memory Seat............................189
Memory Seats and Radio....................189
Methanol...............................542
Mini-Trip Computer.......................332
Mirrors................................122
Automatic Dimming....................123
Electric Powered.......................125
Electric Remote........................125
Exterior Folding........................124
Heated..............................126Outside..............................124
Rearview............................122
Vanity...............................126
Mode
Fuel Saver............................330
Modifications/Alterations, Vehicle...............9
Monitor, Tire Pressure System................531
Mopar Parts.............................611
MTBE/ETBE............................542
Multi-Function Control Lever.................197
New Vehicle Break-In Period.................108
Occupant Restraints........................51
Occupant Restraints (Sedan)..................72
Octane Rating, Gasoline (Fuel)................541
Odometer...............................306
Trip ................................306
Off-Pavement Driving (Off-Road)..............482
692 INDEX