octane JEEP WRANGLER 2006 TJ / 2.G Owners Manual

These effects can be reduced by timely rotation of tires.
The benefits of rotation are especially worthwhile with
aggressive tread designs such as those on On/Off Road
type tires. Rotation will increase tread life, help to main-
tain mud, snow, and wet traction levels, and contribute to
a smooth, quiet ride.
Follow the recommended tire rotation frequency for your
type of driving found in the “Maintenance Schedules”
Section of this manual. More frequent rotation is permis-
sible if desired. The reasons for any rapid or unusual
wear should be corrected prior to rotation being per-
formed.
The suggested rotation method is the “forward-cross”
shown in the following diagram.
FUEL REQUIREMENTS
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
STARTING AND OPERATING 229
5

CAUTION!
DO NOT use gasoline containing METHANOL.
Gasoline containing methanol may damage critical
fuel system components.
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
or not his/her gasoline contains MMT. It is even more important to look for gasoline without
MMT in Canada because MMT can be used at levels
higher than allowed in the United States. MMT is pro-
hibited 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.
STARTING AND OPERATING 231
5

Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine performance,
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 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 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
232 STARTING AND OPERATING

FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine
Component Fluid, Lubricant, or Genuine Part
Engine Coolant Mopar Antifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid Or-
ganic Additive Technology)
Engine Oil API Certified SAE 5W-30 Engine Oil is recommended for the 2.4L engine. API Certified SAE 10W-30 Engine Oil is recommended for the 4.0L engine. Meets
the requirements of DaimlerChrysler Material Standard MS-6395.
Spark Plugs Refer to the Vehicle Emission Control Information label in the engine compart- ment.
Oil Filter (2.4L Engine) Mopar Oil Filter (P/N 4105409AB)
Oil Filter (4.0L Engine) Mopar Oil Filter (P/N 05281090)
Fuel Selection 87 Octane
MAINTAINING YOUR VEHICLE 315
7

Shifting............................. 196
Four Wheel Drive Operation .............194,195
Front Axle (Differential) ................... 296
Fuel ................................. 229
Filler Cap (Gas Cap) .................... 233
Filter ............................... 278
Gasoline ............................ 229
Gauge .............................. 152
Materials Added ....................... 231
Octane Rating ........................ 230
Requirements ......................... 314
Tank Capacity ........................ 314
Fuel System Caution ................... 232,234
Fuses ................................ 305
Gas Cap (Fuel Filler Cap) .................. 233
Gasoline (Fuel) ......................... 229
Gasoline, Reformulated ................... 230
Gasoline/Oxygenate Blends ................ 230 Gauges
Coolant Temperature .................... 149
Fuel ................................ 152
Odometer ........................... 150
Oil Pressure .......................... 149
Speedometer ......................... 148
Tachometer .......................... 147
Voltmeter ............................ 147
Gear Ranges ........................ 187,189
Glass Cleaning .......................... 300
Glove Compartment ...................... 73
Gross Axle Weight Rating .................. 237
Gross Vehicle Weight Rating ................ 236
HardTop .............................. 89
Hard Top Removal ....................... 90
Hazard Warning Flasher ................... 252
Headlights Bulb Replacement ...................... 310
INDEX 353
10

Octane Rating, Gasoline (Fuel).............. 230
Odometer ............................. 150
Trip ................................ 150
Off-Pavement Driving (Off-Road) ............ 209
Off-Road Driving (Off-Pavement) ............ 209
Oil, Engine ............................ 271
Capacity ............................ 314
Dipstick ............................. 271
Filter ............................... 274
Identification Logo ..................... 273
Materials Added to ..................... 274
Recommendation ................... 273,314
Viscosity .......................... 274,314
Onboard Diagnostic System ..............268,269
Outside Rearview Mirrors .................. 56
Overheating, Engine ...................... 253
Owner’s Manual (Operator Manual) .......... 344
Paint Care ............................. 297 Paint Damage
.......................... 297
Parking Brake .......................... 200
Passing Light ........................... 65
PCV Valve ............................ 277
Pets .................................. 44
Pets, Transporting ........................ 44
Placard, Tire and Loading Information ......... 217
Polishing and Waxing ..................... 298
Power Distribution Center ..................... 307
Steering .......................... 207,281
Pregnant Women and Seat Belts .............. 26
Preparation for Jacking .................... 256
Pressure Gauge, Oil ...................... 149
Radial Ply Tires ......................... 224
Radio Broadcast Signals ................... 153
Radio Operation ...................... 154,172
Radio, Satellite .......................... 167
INDEX 357
10