2016 JEEP GRAND CHEROKEE octane

FUEL REQUIREMENTS
6.4L Engine
This engine is designed to meet all
emission regulations, provide optimal
fuel economy and performance when
using high-quality unleaded “Pre-
mium” gasoline having a posted oc-
tane number of 91 as specified by the
(R+M)/2 method. The use of 91 or
higher octane “Premium” gasoline is required for in this
engine.
While operating on gasoline with the required octane
number, hearing a light knocking sound from the engine
is not a cause for concern. However, if the engine is heard
making a heavy knocking sound, see your dealer imme-
diately. Use of gasoline with a lower than recommended octane number can cause engine failure and may void or
not be covered by the New Vehicle Limited Warranty.
Poor quality gasoline can cause problems such as hard
starting, stalling, and hesitations. If you experience these
symptoms, try another brand of gasoline before consid-
ering service for the vehicle.
Reformulated Gasoline
Many areas of the country require the use of cleaner
burning gasoline referred to as “Reformulated Gasoline”.
Reformulated gasoline contains oxygenates and are spe-
cifically blended to reduce vehicle emissions and im-
prove air quality.
The use of reformulated gasoline is recommended. Prop-
erly blended reformulated gasoline will provide im-
proved performance and durability of engine and fuel
system components.
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STARTING AND OPERATING 555

•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.
MMT In Gasoline
Methylcyclopentadienyl Manganese Tricarbonyl (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.
Materials Added To Fuel
Besides using unleaded gasoline with the proper octane
rating, gasolines that contain detergents, corrosion and
stability additives are recommended. Using gasolines
that have these additives will help improve fuel
economy, reduce emissions, and maintain vehicle perfor-
mance.
Designated TOP TIER Detergent Gaso-
line contains a higher level of deter-
gents to further aide in minimizing
engine and fuel system deposits.
When available, the usage of Top Tier
Detergent gasoline is recommended.
Visit www.toptiergas.com for a list of
TOP TIER Detergent Gasoline Retailers.
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STARTING AND OPERATING 557

Indiscriminate use of fuel system cleaning agents should
be avoided. Many of these materials intended for gum
and varnish removal may contain active solvents or
similar ingredients. These can harm fuel system gasket
and diaphragm materials.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•The use of leaded gasoline is prohibited by Federal
law. Using leaded gasoline can impair engine per-
formance 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
(Continued)
CAUTION! (Continued)
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 and may void or not be covered
under the New Vehicle Limited Warranty.
NOTE: Intentional tampering with the emissions control
system can result in civil penalties being assessed against
you.
558 STARTING AND OPERATING

FLUIDS, LUBRICANTS, AND GENUINE PARTS
Engine
ComponentFluid, Lubricant or Genuine Part
Engine Coolant We recommend you use MOPAR Antifreeze/Coolant 10 Year/150,000 Mile
Formula OAT (Organic Additive Technology) that meets the requirements
of FCA Material Standard MS.90032.
Engine Oil For best performance and maximum protection under all types of operating
conditions, the manufacturer only recommends full synthetic engine oils
that meet the American Petroleum Institute (API) categories of SN.
The manufacturer recommends the use of Pennzoil Ultra 0W-40 or equiva-
lent MOPAR engine oil meeting the requirements of FCA Material Standard
MS-12633 for use in all operating temperatures.
Engine Oil Filter We recommend you use MOPAR Engine Oil Filters.
Spark Plugs We recommend you use MOPAR Spark Plugs.
Fuel Selection Premium Unleaded 91 Octane Only or Higher, 0-15% Ethanol.
676 MAINTAINING YOUR VEHICLE

Flashers............................... .582
Hazard Warning ....................... .582
Turn Signal ..................113, 316, 670, 672
Flooded Engine Starting ....................466
Fluid, Brake ............................ .677
Fluid Capacities ......................... .675
Fluid Leaks .............................113
Fluid Level Checks Brake ............................... .646
Cooling System ........................ .639
Engine Oil ........................... .614
Fluids, Lubricants And Genuine Parts ...........676
Fog Lights ............................. .671
Fog Light Service ........................ .671
Folding Rear Seat ........................ .159
Forward Collision Warning ..................217
Four-Way Hazard Flasher ...................582
Freeing A Stuck Vehicle .....................600
Front Axle (Differential) .....................647 Fuel
.................................. .555
Adding ............................. .559
Additives ............................ .557
Clean Air ............................ .555
Economy Mode ....................... .470
Ethanol ............................. .556
Gasoline ............................. .555
Light ............................... .312
Materials Added ....................... .557
Methanol ............................ .556
Octane Rating ..................... .555, 676
Requirements ...................... .555, 675
Tank Capacity ......................... .675
Fueling ............................... .559
Fuses ................................. .657
Garage Door Opener (HomeLink) ..........250, 257
Gasoline,

Clean Air ....................... .555
Gasoline (Fuel) .......................... .555
706 INDEX

Outside............................. .130
Rearview ............................ .122
Vanity .............................. .133
Modifications/Alterations, Vehicle ...............9
Monitor, Tire Pressure System ................547
MOPAR Parts ........................ .613, 693
MTBE/ETBE ........................... .556
Multi-Function Control Lever .................168
Occupant Restraints ........................50
Octane Rating, Gasoline (Fuel) ................555
Oil, Engine ...................... .326, 614, 676
Capacity ............................ .675
Change Interval ....................... .615
Checking ............................ .614
Disposal ............................. .617
Filter ............................ .617, 676
Filter Disposal ........................ .617
Identification Logo ..................... .616Materials Added To
..................... .617
Pressure Warning Light ...................297
Recommendation ....................615, 675
Synthetic ............................ .617
Viscosity ...................... .615, 617, 675
Oil Filter, Change ........................ .617
Oil Filter, Selection ....................... .618
Oil Pressure Light ........................ .297
Onboard Diagnostic System ..................610
Opener, Garage Door (HomeLink) .............250
Operating Precautions ..................... .610
Operator Manual (Owner’s Manual) .............6
Outside Rearview Mirrors ...................130
Overhead Console ........................ .248
Overheating, Engine ...................... .582
Owner’s Manual (Operator Manual) ..........6,694
Paint Care ............................. .651
Panic Alarm ..............................
25
10
INDEX 711