2010 JEEP LIBERTY octane

FUEL REQUIREMENTS
All engines are 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.
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 gasoline that meets 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 373

•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 emission 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 gasolines 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
California 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 375

Fuel System Cautions
CAUTION!
Use the following guidelines to maintain your vehi-
cle’s performance:
•The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine perfor-
mance, and damage the emission 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
service. 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 concentra-
tions of methanol. Fuel system damage or vehicle
performance problems resulting from the use of
such fuels or additives is not the responsibility of
the manufacturer.
NOTE: Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
376 STARTING AND OPERATING

FLUIDS, LUBRICANTS, AND GENUINE PARTS
Engine
ComponentFluid, Lubricant, or Genuine Part
Engine Coolant MOPARAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hy-
brid Organic Additive Technology) or equivalent.
Engine Oil 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 MOPAREngine Oil Filter or equivalent.
Spark Plugs ZFR6F-11G (Gap 0.043 in [1.09 mm])
Fuel Selection 87 Octane
466 MAINTAINING YOUR VEHICLE

Turn Signal................ 88,152,211,462,464
Flash-To-Pass ........................... 153
Flipper Glass, Liftgate ..................... 39
Flooded Engine Starting ................... 300
Floor Console .......................... 192
Fluid, Brake ........................... 467
Fluid Capacities ......................... 465
Fluid Leaks ............................. 88
Fluid Level Checks .................... 444,445
Automatic Transmission ................. 443
Brake .............................. 441
Cooling System ....................... 435
Engine Oil ........................... 424
Power Steering ........................ 327
Fluids, Lubricants and Genuine Parts .......... 466
Fog Light Service ........................ 463
Fog Lights .................... 148,152,211,463
Folding Rear Seat ........................ 139 Four Wheel Drive
Shifting ..................... 309,312,315,318
Systems .......................... 309,315
Four Wheel Drive Operation ................ 309
Shifting into Transfer Case Neutral (N) ....... 397
Shifting out of Transfer Case Neutral (N) ..... 397
Front Axle (Differential) ................... 445
Fuel ................................. 373
Additives ............................ 375
Clean Air ............................ 373
Ethanol ............................. 374
Filler Cap (Gas Cap) .................... 378
Gasoline ............................ 373
Gauge .............................. 208
Materials Added ....................... 375
Methanol ............................ 374
Octane Rating ...................... 373,466
Requirements ......................... 373
Specifications ......................... 466
506 INDEX

Rearview............................. 94
Vanity ............................... 97
Modifications/Alterations, Vehicle ............. 8
Monitor, Tire Pressure System ............... 363
Mopar Parts ......................... 422,494
MTBE/ETBE ........................... 374
Multi-Function Control Lever ............... 148
New Vehicle Break-In Period ................ 85
Occupant Restraints ....................... 40
Occupant Restraints (Sedan) ................. 60
Octane Rating, Gasoline (Fuel) ............373,466
Odometer Trip ................................ 217
Off-Pavement Driving (Off-Road) ............ 321
Off-Road Driving (Off-Pavement) ............ 321
Oil Change Indicator .................. 220,226
Oil Change Indicator, Reset ..............220,226Oil, Engine
......................... 424,466
Capacity ............................ 465
Change Interval .................. 220,226,425
Checking ............................ 424
Dipstick ............................. 424
Disposal ............................ 426
Filter ............................ 427,466
Filter Disposal ........................ 426
Identification Logo ..................... 425
Materials Added to ..................... 426
Recommendation ................... 425,465
Synthetic ............................ 426
Viscosity ......................... 426,465
Oil Filter, Change ........................ 427
Onboard Diagnostic System ..............420,421
Opener, Garage Door (HomeLink) ........... 173
Operating Precautions .................... 420
Operator Manual (Owner’s Manual) ............ 5
Outside Rearview Mirrors .................. 95
512 INDEX