octane JEEP GRAND CHEROKEE 2013 WK2 / 4.G SRT Owners Manual

FUEL REQUIREMENTS
6.4L Engine
The 6.4L 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. 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.
Reformulated Gasoline
Many areas of the country require the use of cleaner
burning gasoline referred to as “Reformulated Gasoline.”
Reformulated gasolines contain oxygenates and are spe-
cifically blended to reduce vehicle emissions and im-
prove air quality.
The manufacturer supports the use of reformulated gaso-
lines. Properly blended reformulated gasolines will pro-
vide excellent performance and durability of engine and
fuel system components.5
STARTING AND OPERATING 513

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. 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 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.5
STARTING AND OPERATING 515

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.
• 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.
(Continued)
CAUTION! (Continued)
•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.
516 STARTING AND OPERATING

FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine
ComponentFluid, Lubricant or Genuine Part
Engine Coolant We recommend you use MOPARAntifreeze/Coolant 10 Year/
150,000 Mile Formula OAT (Organic Additive Technology).
Engine Oil For best performance and maximum protection under all types of
operating conditions, the manufacturer only recommends full syn-
thetic engine oils that meet the American Petroleum Institute (API)
categories of SM or SM/CF.
The manufacturer recommends the use of a full synthetic SAE 0W-40
engine oil.
Engine Oil Filter We recommend you use MOPAREngine Oil Filters.
Spark Plugs We recommend you use MOPARSpark Plugs.
Fuel Selection Premium Unleaded 91 Octane Only or Higher.
7
MAINTAINING YOUR VEHICLE 609

Turn Signal...........................116
Flipper Glass, Liftgate .......................45
Flooded Engine Starting ....................451
Fluid Capacities ......................... .608
Fluid Leaks .............................116
Fluid Level Checks Brake .............................. .584
Cooling System ....................... .578
Engine Oil ........................... .564
Fluids, Lubricants and Genuine Parts ...........609
Fog Lights ............................. .317
Fog Light Service ........................ .604
Folding Rear Seat ........................ .190
Forward Collision Warning ..................250
Four-Way Hazard Flasher ...................536
Freeing A Stuck Vehicle .....................552
Front Axle (Differential) .....................585
Fuel .................................. .513
Adding ............................. .517Additives
........................... .515
Clean Air ........................... .513
Conserving .......................... .342
Ethanol ............................. .514
Filler Cap (Gas Cap) ....................517
Gasoline ............................ .513
Gauge .............................. .323
Light .............................. .337
Materials Added ...................... .515
Methanol ........................... .514
Octane Rating ........................ .513
Requirements ........................ .513
Saver Mode .......................... .342
Tank Capacity ........................ .608
Fueling ............................... .517
Fuel Optimizer .......................... .342
Fuel Saver ............................. .342
Fuel

System Caution ...................... .519
Fuses ................................. .594
10
INDEX 645

Monitor, Tire Pressure System................505
Mopar Parts ............................ .562
MTBE/ETBE ........................... .514
Multi-Function Control Lever .................201
New Vehicle Break-In Period .................111
Occupant Restraints ........................50
Occupant Restraints (Sedan) ..................73
Octane Rating, Gasoline (Fuel) ................513
Odometer .............................. .318
Trip ............................... .318
Oil Change Indicator ...................... .341
Oil Change Indicator, Reset ..................341
Oil, Engine ............................. .564
Capacity ............................ .608
Change Interval ....................... .565
Checking ........................... .564
Disposal ............................ .566Filter
.............................. .567
Filter Disposal ........................ .566
Identification Logo ..................... .565
Materials Added to .....................566
Recommendation ...................... .565
Synthetic ............................ .566
Viscosity ............................ .566
Oil Filter, Selection ....................... .567
Onboard Diagnostic System ..................560
Opener, Garage Door (HomeLink) ............269
Operating Precautions ..................... .560
Operator Manual (Owner’s Manual) .............5
Outside Rearview Mirrors ...................126
Overdrive .............................. .462
Overdrive OFF Switch ..................... .462
Overhead Console ........................ .267
Overheating, Engine ...................... .324
Owner’s Manual (Operator Manual) .............5
650 INDEX