2012 JEEP GRAND CHEROKEE octane

Telltale Lightwill flash on and off for 75 sec-
onds and then turn off, and the Electronic
Vehicle Information Center (EVIC) will display
the “SERVICE TPM SYSTEM” message. The
EVIC will also display pressure values in place
of the dashes. On the next ignition switch cycle
the SERVICE TPM SYSTEM message will no
longer be displayed as long as no system fault
exists.
General InformationTransmitter and receivers operate on a carrier
frequency of 433.92 MHz as required by EEC
regulations. These devices must be certified to
conform to specific regulations in each indi-
vidual country. Two sets of regulations are
involved: ETS (European Telecommunication
Standard) 300–220, which most countries use,
and German BZT federal regulation 225Z125,
which is based on ETC 300–220 but has addi-
tional unique requirements. Other defined re-
quirements are noted in ANNEX VI of COMMIS-
SION DIRECTIVE 95/56/EC. Operation is
subject to the following conditions:
• This device may not cause harmful interfer-
ence. •
This device must accept any interference
received, including interference that may
cause undesired operation.
FUEL REQUIREMENTS —
GASOLINE ENGINE
3.6L Engine
These engines are designed to meet all emis-
sions regulations and provide excellent fuel
economy and performance when using high-
quality unleaded gasoline with a minimum re-
search octane rating of 91. The use of premium
gasoline is not recommended, as it will not
provide any benefit over regular gasoline in
these engines.
5.7L EngineTheses engines are designed to meet all emis-
sions regulations and provide satisfactory fuel
economy and performance when using high-
quality unleaded gasoline having an octane
range of 91 to 95. The manufacturer recom-
mends the use of 95 octane for optimum per-
formance. The use of premium gasoline is not
recommended, 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
experience 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 Worldwide Fuel Charter,
WWFC) which define fuel properties necessary
to deliver enhanced emissions, performance,
and durability for your vehicle. The manufac-
turer recommends the use of gasoline that
meets the WWFC specifications if they are
available.
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 may help improve fuel
economy, reduce emissions, and maintain ve-
hicle performance.
262

Poor quality gasoline can cause problems such
as hard starting, stalling and stumble. If you
experience these problems, try another brand
of gasoline before considering service for the
vehicle.
Methanol
(Methyl or Wood Alcohol) is used in a variety of
concentrations when blended with unleaded
gasoline. You may find fuels containing 3% or
more Methanol along with other alcohols called
cosolvents. Problems that result from using
Methanol/gasoline or E-85 Ethanol blends are
not the responsibility of the manufacturer. While
MTBE is an oxygenate made from Methanol, it
does not have the negative effects of Methanol.
CAUTION!
Do not use gasolines containing Methanol or
E-85 Ethanol. Use of these blends may result
in starting and driveability problems and may
damage critical fuel system components.Ethanol
The manufacturer recommends that your ve-
hicle be operated on fuel containing no more
than 10% Ethanol. Purchasing your fuel from a
reputable supplier may reduce the risk of ex-
ceeding this 10% limit and/or of receiving fuel
with abnormal properties. It should also be
noted that an increase in fuel consumption
should be expected when using Ethanol-
blended fuels, due to the lower energy content
of Ethanol.
Problems that result from using Methanol/
gasoline or E-85 Ethanol blends are not the
responsibility of the manufacturer. While MTBE
is an oxygenate made from Methanol, it does
not have the negative effects of Methanol.CAUTION!
Use of fuel with Ethanol content higher than
10% may result in engine malfunction, starting
and operating difficulties and materials degra-
dation. These adverse effects could result in
permanent damage to your vehicle.Clean Air Gasoline
Many gasolines are now being blended that
contribute to cleaner air, especially in those
areas where air pollution levels are high. These
new blends provide a cleaner burning fuel and
some are referred to as “reformulated gaso-
line.”
The manufacturer supports these efforts toward
cleaner air. You can help by using these blends
as they become available.
MMT in Gasoline
MMT is a manganese containing metallic addi-
tive 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 emission system
performance in some vehicles. The manufac-
turer 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 or not his/her gasoline contains
MMT.
263

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.
Indiscriminate use of fuel system cleaning
agents should be avoided. Many of these ma-
terials intended for gum and varnish removal
may contain active solvents or similar ingredi-
ents. These can harm fuel system gasket and
diaphragm materials.
WARNING!
Carbon monoxide (CO) in exhaust gases is
deadly. Follow the precautions below to pre-
vent carbon monoxide poisoning:(Continued)
WARNING!(Continued)
• Do not inhale exhaust gases. They contain
carbon monoxide, a colorless and odorless
gas which can kill. Never run the engine in
a closed area, such as a garage, and never
sit in a parked vehicle with the engine
running for an extended period. If the ve-
hicle is stopped in an open area with the
engine running for more than a short pe-
riod, adjust the ventilation system to force
fresh, outside air into the vehicle.
• Guard against carbon monoxide with
proper maintenance. Have the exhaust
system inspected every time the vehicle is
raised. Have any abnormal conditions re-
paired promptly. Until repaired, drive with
all side windows fully open.
• Keep the liftgate closed when driving your
vehicle to prevent carbon monoxide and
other poisonous exhaust gases from enter-
ing the vehicle.FUEL REQUIREMENTS — DIESEL
ENGINE
Use good quality diesel fuel from a reputable
supplier. For most year-round service, No. 2
diesel fuel, meeting ASTM specification D-975
Grade S15, will provide good performance. If
the vehicle is exposed to extreme cold (below
20° F or -7° C), or is required to operate at
colder-than-normal conditions for prolonged
periods, use climatized No. 2 diesel fuel or
dilute the No. 2 diesel fuel with 50% No. 1
diesel fuel. This will provide better protection
from fuel gelling or wax-plugging of the fuel
filters. This vehicle must only use premium
diesel fuel that meets the requirements of
EN 590. Biodiesel blends that meet EN 590
may also be used.
CAUTION!
The manufacturer requires that you must fuel
this vehicle with Ultra Low Sulfur Highway
Diesel fuel (15 ppm Sulfur maximum) and
prohibits the use of Low Sulfur Highway Die-
sel fuel (500 ppm Sulfur maximum) to avoid
damage to the emissions control system.
264

ComponentFluid, Lubricant, or Genuine Part
Spark Plugs – 5.7L Engine LZFR5C–11G (Gap 0.043 in [1.1 mm])
Fuel Selection – 3.6L Engine 91 Octane
Fuel Selection – 5.7L Engine 91 Octane Acceptable - 95 Octane Recommended
Fuel Selection – 3.0L Diesel Engine Use good quality diesel fuel from a reputable supplier in your vehicle. The manufacturer requires
that you must fuel this vehicle with Ultra Low Sulfur Highway Diesel fuel (15 ppm Sulfur maximum)
and prohibits the use of Low Sulfur Highway Diesel fuel (500 ppm Sulfur maximum) to avoid dam-
age to the emissions control system. For most year-round service, No. 2 diesel fuel meeting ASTM
specification D-975 Grade S15 will provide good performance. If the vehicle is exposed to extreme
cold (below 20F or -7C), or is required to operate at colder-than-normal conditions for prolonged
periods, use climatized No. 2 diesel fuel or dilute the No. 2 diesel fuel with 50% No. 1 diesel fuel.
This will provide better protection from fuel gelling or wax-plugging of the fuel filters. This vehicle is
fully compatible with biodiesel blends up to 5% biodiesel meeting ASTM specification D-975.
328

Jump Starting..............287
Engine Air Cleaner ................304
Break-In Recommendations .......55
Compartment .........298,299,300
Compartment Identification . . 298,299,300
Cooling ..................308
Exhaust Gas Caution .........29,56
Fails to Start ...............218
Flooded, Starting ............218
Fuel Requirements .........262,326
Jump Starting ..............287
Multi-Displacement ...........244
Oil .................. 302,326
Oil Change Interval ...........302
Oil Disposal ...............304
Oil Filter .................304
Oil Selection .......... 302,303,326
Oil Synthetic ...............303
Overheating ...............282
Starting ..................216
Temperature Gauge ...........164
Engine Oil Viscosity ............303
Engine Oil Viscosity Chart ........303
Enhanced Accident Response Feature . . 44
Entry System, Illuminated ..........17
Ethanol ...................263 Event Data Recorder
............46
Exhaust Gas Caution ........29,56,307
Exhaust System ............ 56,307
Exterior Finish Care ............316
Exterior Lights ................58
Filters Air Cleaner ................304
Engine Oil ................304
Finish Care .................316
Flashers ..................282
Hazard Warning .............282
Turn Signal ......... 58,160,323,324
Flipper Glass, Liftgate ...........27
Flooded Engine Starting .........218
Fluid Capacities ..............326
Fluid Leaks .................58
Fluid Level Checks Automatic Transmission ....313,314,315
Brake ...................312
Engine Oil ................302
Power Steering .............243
Fluids, Lubricants and Genuine Parts . . 327
Fog Light Service .............323
Fog Lights ............ 108,160,323
Fog

Lights, Rear ..............164 Folding Rear Seat
.............100
Forward Collision Warning . . . 129,170,180
Four Wheel Drive ........... 231,234
Operation ................231
Systems .................231
Four Wheel Drive Operation .......231
Four-Way Hazard Flasher .........282
Freeing A Stuck Vehicle ..........289
Front Axle (Differential) ..........312
Fuel .....................262
Additives .................264
Conserving ................173
Diesel ..................264
Filler Cap (Gas Cap) ........265,266
Gasoline .................262
Gauge ..................163
Light ...................170
Octane Rating ..............262
Requirements ..............326
Saver Mode ...............173
Tank Capacity ..............326
Fuel Optimizer ...............173
Fuel Saver .................173
Fuel System Caution ............265
Fuses ....................318
368

Octane Rating, Gasoline (Fuel)......262
Odometer ..................160
Trip ....................160
Off-Pavement Driving (Off-Road) .....239
Off-Road Driving (Off-Pavement) .....239
Oil Change Indicator ...........172
Oil Change Indicator, Reset .......172
Oil, Engine .................302
Capacity .................326
Change Interval .............302
Diesel ..................303
Dipstick .................302
Filter ...................304
Identification Logo ...........302
Materials Added to ...........304
Recommendation .......302,303,326
Synthetic .................303
Viscosity ............... 303,326
Onboard Diagnostic System .......301
Operator Manual (Owner’s Manual) .....6
Outside Rearview Mirrors ..........67
Overdrive ............... 226,230
Overdrive OFF Switch ........226,230
Overhead Console .............138
Overheating, Engine .........164,282
Owner’s Manual (Operator Manual) .....6Paint Care
.................315
Paint Damage ...............315
Park Sense System, Rear .........131
Parking Brake ...............244
Personal Settings .............179
Pets ......................55
Pets, Transporting ..............55
Phone, Cellular ...............74
Phone, Hands-Free (Uconnect™) .....74
Polishing and Waxing ...........316
Power Door Locks ................21
Lift Gate ..................27
Mirrors ...................68
Outlet (Auxiliary Electrical Outlet) . . . 142
Seats .................. 94,95
Steering ............... 242,243
Sunroof ............... 139,140
Tilt/Telescoping Steering Column . . . 114
Windows ..................24
Pregnant Women and Seat Belts .....37
Preparation for Jacking ..........283
Pretensioners Seat Belts .................34
Programmable Electronic Features ....
179
Programming Transmitters
(Remote Keyless Entry) ...........17 Quadra-Lift
.................236
Quadra-Trac ................231
Radial Ply Tires ..............253
Radio (Sound Systems) ..........183
Radio Operation ..............204
Rain Sensitive Wiper System .......112
Rear Axle (Differential) ..........312
Rear Camera ................136
Rear Cross Path ...............72
Rear Cupholder ..............144
Rear Fog Lights ..............164
Rear Park Sense System .........131
Rear Seat, Folding .............100
Rear Window Defroster ..........150
Rear Window Features ..........149
Rear Wiper/Washer ............149
Rearview Mirrors ..............67
Recorder, Event Data ............46
Recreational Towing ............276
Shifting into Transfer Case Neutral
(N) ....................277
Shifting out of Transfer Case Neutral
(N) ....................279
Refrigerant .................305
Reminder, Seat Belt .............37
371