octane JEEP GRAND CHEROKEE LIMITED 2019 Owners Manual

FUEL REQUIREMENTS
3.6L Engine
Do not use E-85 flex fuel or ethanol blends greater than
15% in this engine.These engines are designed to meet all
emissions regulations and provide opti-
mum fuel economy and performance
when using high quality unleaded
“Regular” gasoline having a posted oc-
tane number of 87 as specified by the
(R+M)/2 method. The use of higher
octane “Premium” gasoline is not required, as it will not
provide any benefit over “Regular” gasoline in these
engines.
While operating on gasoline with an octane number of 87,
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 an dealer immediately. Use of
gasoline with an octane number lower than 87 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 consider-
ing service for the vehicle.
5.7L Engine
Do not use E-85 flex fuel or ethanol blends greater than
15% in this engine.
This engine is designed to meet all emis-
sions regulations and provide satisfac-
tory fuel economy and performance
when using high-quality unleaded gaso-
line having an octane range of 87 to 89 as
specified by the (R+M)/2 method. The
use of 89 octane “Plus” gasoline is rec-
ommended for optimum performance and fuel economy.
While operating on gasoline with an octane number of 87,
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 immediately. Use
of gasoline with an octane number lower than 87 can cause
engine failure and may void or not be covered by the New
Vehicle Limited Warranty.
9
TECHNICAL SPECIFICATIONS 501

Poor quality gasoline can cause problems such as hard
starting, stalling, and hesitations. If you experience these
symptoms, try another brand of gasoline before consider-
ing 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 specifi-
cally blended to reduce vehicle emissions and improve air
quality.
The use of reformulated gasoline is recommended. Prop-
erly blended reformulated gasoline will provide improved
performance and durability of engine and fuel system
components.
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 performance.Designated TOP TIER Detergent Gaso-
line contains a higher level of detergents
to further aide in minimizing engine
and fuel system deposits. When avail-
able, the usage of TOP TIER Detergent
gasoline is recommended. Visit
www.toptiergas.com for a list of TOP
TIER Detergent Gasoline Retailers.
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 dia-
phragm materials.
Gasoline/Oxygenate Blends
Some fuel suppliers blend unleaded gasoline with oxygen-
ates such as ethanol.

CAUTION!(Continued)
cause emissions to exceed the applicable standard,
and/or cause the Malfunction Indicator Light to illu-
minate. Please observe pump labels as they should
clearly communicate if a fuel contains greater than 15%
ethanol (E-15).
Problems that result from using gasoline containing more
than 15% ethanol (E-15) or gasoline containing methanol
are not the responsibility of the manufacturer and may
void or not be covered under New Vehicle Limited War-
ranty.
Do Not Use E-85 In Non-Flex Fuel Vehicles
Non-Flex Fuel Vehicles (FFV) are compatible with gasoline
containing up to 15% ethanol (E-15). Use of gasoline with
higher ethanol content may void the New Vehicle Limited
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.
CNG And LP Fuel System Modifications
Modifications that allow the engine to run on Compressed
Natural Gas (CNG) or Liquid Propane (LP) may result in
damage to the engine, emissions, and fuel system compo-
nents. Problems that result from running CNG or LP are
not the responsibility of the manufacturer and may void or
not be covered under the New Vehicle Limited Warranty.
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. Gaso-
line 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.
9
TECHNICAL SPECIFICATIONS 503

Gasoline.............................. .501
Light ................................ .155
Materials Added ........................ .502
Methanol ............................. .502
Octane Rating ....................... .501, 506
Requirements .......................... .501
Tank Capacity .......................... .505
Fueling ................................. .359
Fuses .................................. .405
Garage Door Opener (HomeLink) ...............114
Gasoline, Clean Air ........................ .502
Gasoline, (Fuel) ........................... .501
Gasoline, Reformulated ..................... .502
Gear Ranges ............................. .266
Glass Cleaning ........................... .495
Glove Compartment Storage ...................120
Gross Axle Weight Rating .....................365
Gross Vehicle Weight Rating ...................364
GVWR ................................. .362
Hazard Warning Flashers .....................392
Headlights Cleaning .............................. .492
Delay ..................................74 High Beam/Low Beam Select Switch
...........73
Lights On Reminder .......................75
On With Wipers ..........................74
Passing ................................73
Switch .................................71
Washers ................................85
Headlight Washers ..........................85
Head Restraints ............................58
Head Rests ................................58
Heated Mirrors .............................70
Heated Seats ...............................54
Heated Steering Wheel .....................63, 64
Heater, Engine Block ....................... .258
Hill Descent Control ....................... .176
Hill Descent Control Indicator .................176
Hill Start Assist ........................... .168
Hitches Trailer

Towing .......................... .366
Hood Closing ............................... .106
Opening .............................. .106
Hood Prop .............................. .106
Hood Release ............................ .106
Ignition ..................................25
12
INDEX 613

Maintenance Free Battery.....................445
Maintenance Schedule .......................437
Malfunction Indicator Light (Check Engine) . . . .155, 163
Manual Service ............................... .606
Memory Feature (Memory Seats) ................51
Memory Seat ..............................51
Methanol ............................... .502
Mirrors ..................................66
Automatic Dimming .......................66
Electric Remote ...........................68
Exterior Folding ..........................67
Heated .................................70
Outside ................................67
Rearview ........................... .66, 392
Vanity .................................70
Modifications/Alterations Vehicle .................................6
Monitor, Tire Pressure System ..................192
Mopar Parts ............................. .605
Multi-Function Control Lever ...................72
New Vehicle Break-In Period ..................259
Occupant Restraints ........................ .198Octane Rating, Gasoline (Fuel)
.................501
Oil, Engine ........................... .446, 506
Capacity .............................. .505
Change Interval ........................ .446
Checking ............................. .444
Disposal .............................. .448
Filter ............................. .448, 506
Filter Disposal .......................... .448
Identification Logo .......................446
Materials Added To .......................447
Pressure Warning Light ................... .152
Recommendation .....................446, 505
Synthetic ............................. .447
Viscosity ....................... .446, 447, 505
Oil Filter, Change ......................... .448
Oil Filter, Selection ......................... .448
Oil Pressure Light ......................... .152
Oil Reset ................................ .138
Onboar

d Diagnostic System .................. .161
Operating Precautions .......................161
Operator Manual Owner’s Manual .......................5,606
Outside Rearview Mirrors .....................67
Overhead Console ......................... .124
616 INDEX