2005 JEEP WRANGLER Oil viscosity

ENGINE BREAK-IN RECOMMENDATIONS
A long break-in period is not required for the engine in
your new vehicle.
Drive moderately during the first 300 miles (500 km).
After the initial 60 miles (100 km), speeds up to 50 or 55
mph (80 or 90 km/h) are desirable.
While cruising, brief full-throttle acceleration, within the
limits of local traffic laws, contributes to a good break-in.
Wide open throttle acceleration in low gear can be
detrimental and should be avoided.
The engine oil installed in the engine at the factory is a
high quality energy conserving type lubricant. Oil
changes should be consistent with anticipated climate
conditions under which vehicle operations will occur.
The recommended viscosity and quality grades are
shown in Section 7 of this manual. NON-DETERGENT
OR STRAIGHT MINERAL OILS MUST NEVER BE
USED.A new engine may consume some oil during its first few
thousand miles (kilometers) of operation. This should be
considered as a normal part of the break-in and not
interpreted as an indication of difficulty.
SAFETY TIPS
Exhaust Gas
WARNING!
Exhaust gases can injure or kill. They contain carbon
monoxide (CO) which is colorless and odorless.
Breathing it can make you unconscious and can
eventually poison you. To avoid breathing (CO)
follow the safety tips below.
•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
44 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

13. Oil Pressure Gauge
Indicates engine oil pressure. This gauge does not
indicate oil level, and pressure varies with engine
speed, temperature and oil viscosity. Consistent lower
readings indicate possible malfunction. Seek authorized
service.
14. Coolant Temperature Gauge
Indicates engine coolant temperature. The red
zone to the far right indicates possible overheat-
ing. Seek authorized service immediately if the
gauge operates in the red zone. In U.S. vehicles, tempera-
ture is indicated in degrees fahrenheit; in Canadian
vehicles in degrees centigrade.
15. Airbag Warning Light
This indicator lights and remains lit for 6 to 8
seconds when the ignition is first turned on. If
the light does not come on for 6 to 8 seconds,stays on or comes on while driving, have the airbag
system checked by an authorized dealer.
16. Check Gauges Warning Light
This light monitors the engine coolant tem-
perature, engine oil pressure, and voltage
gauges. If it detects an extreme condition a
chime will sound and the light will come on. If the light
comes on, check the operation of these gauges for a
malfunction condition.
17. Malfunction Indicator Light
This light is a part of an Onboard Diagnostic
System called OBD II that monitors engine, and
automatic transmission control systems. The light
will illuminate when the ignition is in the ON position
before engine start. If the bulb does not come on when
turning the key from OFF to ON, have the condition
checked promptly.
UNDERSTANDING YOUR INSTRUMENT PANEL 145
4

Engine Oil Viscosity (2.4L Engines)
SAE 5W-30 engine oil is recommended for all operating
temperatures. This engine oil improves low tempera-
ture starting and vehicle fuel economy. Refer to your
engine oil filler cap for the recommended engine oil
viscosity for your vehicle.
Engine Oil Viscosity (4.0L Engines)
SAE 10W-30 engine oil is recommended. Refer to your
engine oil filler cap for the recommended engine oil
viscosity for your vehicle.
For information on engine oil filler cap location, see the
Engine Compartment illustration in this section.
Lubricants which do not have both, the engine oil certi-
fication mark and the correct SAE viscosity grade num-
ber should not be used.
4.0L Engines
256 MAINTAINING YOUR VEHICLE

Oil Filter............................ 257
Oil Pressure Gauge..................... 145
Oil Selection.......................... 295
Overheating.......................... 237
Starting............................. 178
Temperature Gauge..................... 145
Engine Oil Viscosity...................... 256
Engine Oil Viscosity Chart................. 256
Entry System, Illuminated.................. 17
Exhaust Gas Caution...................44,225
Exhaust System......................... 266
Extender, Seat Belt........................ 26
Exterior Finish Care...................... 280
Fabric Care.........................280,283
Fabric Top............................. 280
Filters
Air Cleaner.......................... 260
Engine Fuel.......................... 260Engine Oil........................... 257
Finish Care............................ 280
Flashers
Hazard Warning....................... 236
Turn Signal.....................143,292,294
Flooded Engine Starting................... 179
Fluid Capacities......................... 295
Fluid Level Checks...................... 278
Automatic Transmission................. 274
Engine Oil........................... 253
Manual Transmission................... 276
Power Steering........................ 263
Fog Light Service........................ 292
Fog Lights...........................63,292
Folding Rear Seat........................ 57
Folding Windshield...................... 130
Four Wheel Drive....................... 190
Shifting............................. 192
Four Wheel Drive Operation.............190,191
336 INDEX

Filter............................... 257
Identification Logo..................... 255
Materials Added to..................... 257
Recommendation...................255,295
Viscosity..........................256,295
Onboard Diagnostic System..............250,251
Outside Rearview Mirrors.................. 54
Overheating, Engine...................... 237
Owner’s Manual........................ 328
Paint Care............................. 279
Paint Damage.......................... 279
Parking Brake.......................... 196
Passing Light........................... 63
PCV Valve............................ 260
Pets.................................. 43
Pets, Transporting........................ 43
Placard, Tire and Loading Information......... 211
Polishing and Waxing..................... 280Power
Distribution Center..................... 288
Steering............................. 263
Pregnant Women and Seat Belts.............. 26
Preparation for Jacking.................... 239
Pressure Gauge, Oil...................... 145
Radial Ply Tires......................... 218
Radio Broadcast Signals................... 149
Radio Operation......................150,169
Radio, Satellite.......................... 163
Radio (Sound Systems).................150,156
Rear Axle............................. 278
Rear Window Defroster................... 137
Rear Window Features.................... 137
Rear Wiper/Washer...................... 138
Rearview Mirrors........................ 50
Reclining Front Seats...................... 56
INDEX 341
10

Hitches............................. 222
Transfer Case........................... 277
Four-Wheel-Drive Operation.............. 191
Maintenance.......................... 277
Transmission
Automatic........................... 184
Maintenance.......................274,276
Manual............................. 181
Shifting............................. 181
Transporting Pets........................ 43
Tread Wear Indicators.................... 218
Trip Odometer.......................... 146
Trip Odometer Reset Button................ 146
Turn Signals....................63,143,292,294
Underhood Fuses........................ 288
Upholstery Care........................ 283
Vacuum/Vapor Harnesses................. 271Variance, Compass....................... 53
Vehicle Identification Number................ 8
Vehicle Loading......................... 212
Vehicle Modifications/Alterations.............. 9
Vehicle Storage......................... 290
Vinyl Trim............................. 283
Viscosity, Engine Oil...................... 256
Voltmeter............................. 143
Warning Lights
(Instrument Cluster Description)........... 143
Warnings and Cautions..................... 7
Warranty Information..................... 325
Washer, Adding Fluid..................... 138
Washers, Windshield..................... 265
Waxing and Polishing..................... 280
Wheel Alignment and Balance............... 220
Wheel Mounting........................ 241
Windshield Defroster..................171,173
INDEX 345
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