2007 JEEP LIBERTY octane

FUEL REQUIREMENTS (GASOLINE ENGINES)
Your engine is designed to meet all emis-
sions regulations and provide excellent
fuel economy and performance when us-
ing high quality unleaded gasoline having
an octane rating of 87. The use of premium
gasoline is not recommended. The use of
premium gasoline will provide no benefit over high
quality regular gasoline, and in some circumstances may
result in poorer performance.
Mid-grade gasoline (89 octane) will enhance engine per-
formance during the following conditions:
•Hot weather
•Towing
•Hard accelerations
•Hilly terrain
•Low humidityLight 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 “regular” gasoline be-
fore considering service for the vehicle.
Over 40 auto manufacturer’s world wide have issued and
endorsed consistent gasoline specifications (the World-
wide Fuel Charter, WWFC) to 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.
STARTING AND OPERATING 273
5

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.
Gasoline/Oxygenate Blends
Some fuel suppliers blend unleaded gasoline with oxy-
genates such as 10% ethanol, MTBE, and ETBE. Oxygen-
ates are required in some areas of the country during the
winter months to reduce carbon monoxide emissions.
Fuels blended with these oxygenates may be used in
your vehicle.
CAUTION!
DO NOT use gasolines containing Methanol or E85
Ethanol. Use of these blends may result in starting
and driveability problems and may damage critical
fuel system components.
Problems that result from using methanol/gasoline or
E85 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 Metha-
nol.
MMT In Gasoline
MMT is a manganese containing metallic additive that is
blended into some gasoline to increase the octane num-
ber. Gasolines blended with MMT offer no performance
advantage beyond gasolines of the same octane number
without MMT. Gasolines blended with MMT have shown
274 STARTING AND OPERATING

•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 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.Carbon Monoxide Warnings
WARNING!
Carbon monoxide (CO) in exhaust gases is deadly.
Follow the precautions below to prevent carbon
monoxide poisoning:
•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 vehicle is
stopped in an open area with the engine running for
more than a short period, adjust the ventilation system
to force fresh, outside air into the vehicle.
•Guard against carbon monoxide with proper mainte-
nance. Have the exhaust system inspected every time
276 STARTING AND OPERATING

FLUIDS, LUBRICANTS, AND GENUINE PARTS
Engine
Component Fluid, Lubricant, or Genuine Part
Engine Coolant MoparAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid Or-
ganic Additive Technology)
Engine Oil (3.7L Engine) Use API Certified SAE 5W-20 Engine Oil, meeting the requirements of
DaimlerChrysler Material Standard MS-6395.
Oil Filter (3.7L Engine) MoparOil Filter (P/N 4781452AA or 4781452BB)
Spark Plugs Refer to the Vehicle Emission Control Information label in the engine com-
partment.
Fuel Selection 87 Octane (89 Octane should be used for trailer towing purposes)
MAINTAINING YOUR VEHICLE 367
7

Filters
Air Cleaner.......................... 324
Engine Oil........................... 323
Engine Oil Disposal.................... 323
FinishCare ............................ 348
Flashers
Hazard Warning....................... 302
Turn Signal.....................166,363,365
Flooded Engine Starting................... 213
Fluid Capacities......................... 366
Fluid Leaks............................. 76
Fluid Level Checks....................... 76
Automatic Transmission................. 345
Clutch Fluid.......................... 342
Engine Oil........................... 320
Manual Transmission................... 344
Power Steering........................ 330
Fluids, Lubricants and Genuine Parts.......... 367
Fog Light Service........................ 364Fog Lights.......................... 118,364
Folding Rear Seat........................ 113
Four Wheel Drive....................... 226
Operation........................... 226
Shifting ..........................228,232
Systems..........................226,229
Four-Way Hazard Flasher.................. 302
FrontAxle(Differential) ................... 342
Fuel................................. 273
Filler Cap (Gas Cap).................... 277
Gasoline............................ 273
Gauge.............................. 173
Hoses.............................. 339
Materials Added....................... 275
Octane Rating........................ 273
Requirements......................273,366
System Hoses......................... 339
Tank Capacity........................ 366
Fuel System Caution................275,278,279
INDEX 405
10

Lubricant Selection..................... 344
Shift Speeds.......................... 218
Map/Reading Lights..................... 134
Master Cylinder (Brakes).................. 341
Mini-Trip Computer...................... 139
Mirrors ................................ 81
Automatic Dimming..................... 82
Electric Remote........................ 83
Exterior Folding........................ 83
Heated.............................. 84
Outside.............................. 82
Rearview............................. 81
Vanity ............................... 84
Modifications/Alterations, Vehicle............. 9
Monitor, Tire Pressure System............... 262
Mopar Parts.........................319,395
Multi-Function Control Lever............... 117
Navigation Radio........................ 191Navigation System....................... 191
New Vehicle Break-In Period................ 74
Occupant Classification System (OCS).......... 56
Occupant Restraints....................... 36
Octane Rating, Gasoline (Fuel).............. 273
Odometer............................. 170
Trip ................................ 170
Off-Pavement Driving (Off-Road)..........235,347
Off-Road Driving (Off-Pavement)..........235,347
Oil, Engine............................ 320
Capacity............................ 366
Change Interval....................... 321
Checking............................ 320
Dipstick............................. 320
Disposal............................ 323
Filter Disposal........................ 323
Identification Logo..................... 322
Materials Added to..................... 323
410 INDEX