2013 JEEP WRANGLER UNLIMITED fuel additives

can be used at levels higher than those allowed in the
United States. MMT is prohibited in Federal and Califor-
nia 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.
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 perfor-
mance and damage the emissions control system. (Continued) CAUTION! (Continued)• 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.
• The use of fuel additives, which are now being sold
as octane enhancers, is not recommended. Most of
these products contain high concentrations of metha-
nol. Fuel system damage or vehicle performance
problems resulting from the use of such fuels or
additives is not the responsibility of the manufac-
turer.
NOTE: Intentional tampering with the emissions control
system can result in civil penalties being assessed against
you.
5 STARTING AND OPERATING 509

CAUTION!Do not use chemical flushes in your engine oil as the
chemicals can damage your engine. Such damage is
not covered by the New Vehicle Limited Warranty.
Engine Oil Viscosity – 3.6L Engine
SAE 5W-20 engine oil is recommended for all operating
temperatures. This engine oil improves low temperature
starting and vehicle fuel economy.
The engine oil filler cap also shows the recommended engine
oil viscosity for your vehicle. For information on engine oil
filler cap location, refer to “Engine Compartment” in “Main-
taining Your Vehicle” for further information.
Lubricants, which do not have both the engine oil certi-
fication mark and the correct SAE viscosity grade num-
ber, should not be used. Synthetic Engine Oils
You may use synthetic engine oils provided the recom-
mended oil quality requirements are met, and the recom-
mended maintenance intervals for oil and filter changes
are followed.
Materials Added To Engine Oil
The manufacturer strongly recommends against the ad-
dition of any additives (other than leak detection dyes) to
the engine oil. Engine oil is an engineered product and its
performance may be impaired by supplemental addi-
tives.
Disposing Of Used Engine Oil And Oil Filters
Care should be taken in disposing of used engine oil and
oil filters from your vehicle. Used oil and oil filters,
indiscriminately discarded, can present a problem to the
environment. Contact your authorized dealer, service568 MAINTAINING YOUR VEHICLE

ABS (Anti-Lock Brake System) ............... .303
Adding Engine Coolant (Antifreeze) ........... .579
Adding Fuel ............................ .510
Additives, Fuel .......................... .509
Airbag ..................................62
Airbag Deployment ........................71
Airbag Light .............................74
Airbag Maintenance ........................73
Airbag, Side ..............................70
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . .569
Air Conditioner Maintenance ................ .571
Air Conditioning ......................... .392
Air Conditioning Controls .................. .392
Air Conditioning Filter .................... .402
Air Conditioning, Operating Tips ............. .403
Air Conditioning Refrigerant ................ .571
Air Conditioning System ................... .392
Air Pressure, Tires ........................ .483
Alarm Light ............................ .305 Alarm (Security Alarm) ......................19
Alterations/Modifications, Vehicle ...............9
Antenna, Satellite Radio .................... .352
Antifreeze (Engine Coolant) ................. .578
Disposal ............................ .581
Anti-Lock Brake System (ABS) ............... .455
Anti-Lock Warning Light ................... .303
Appearance Care ........................ .591
Arming Theft System (Security Alarm) ...........20
Assistance Towing ........................ .130
Auto Down Power Windows ..................42
Automatic Door Locks ......................39
Automatic Headlights ..................... .168
Automatic Oil Change Indicator .............. .325
Automatic Temperature Control (ATC) ......... .396
Automatic Transmission ................... .420
Adding Fluid ........................ .588
Fluid and Filter Changes ................ .588
Fluid Change ........................ .588634 INDEX

Fluid Level Check ..................... .586
Fluid Type .......................... .585
Special Additives ...................... .585
Autostick .............................. .426
Auxiliary Electrical Outlet (Power Outlet) ....... .182
Auxiliary Power Outlet .................... .182
Axle Lock .............................. .433
Battery ................................ .570
Keyless Transmitter Replacement (RKE) ........27
Belts, Seat ...............................48
Body Mechanism Lubrication ................ .572
Brake Assist System ...................... .457
Brake Control System, Electronic ............. .456
Brake System ........................... .583
Anti-Lock (ABS) ...................... .455
Master Cylinder ....................... .583
Parking ............................. .452
Warning Light ........................ .302 Brake/Transmission Interlock ................ .419
Break-In Recommendations, New Vehicle .........98
Bulb Replacement ........................ .606
Bulbs, Light ............................ .103
Calibration, Compass ..................... .318
Capacities, Fluid ......................... .610
Caps, Filler
Fuel ............................... .510
Power Steering ....................... .451
Radiator (Coolant Pressure) .............. .580
Carbon Monoxide Warning ................. .100
Cargo Light ............................ .172
Car Washes ............................ .592
Cellular Phone ...........................114
Center High Mounted Stop Light ............. .609
Certification Label ........................ .513
Chains, Tire ............................ .492
Changing A Flat Tire ...................... .540
10 INDEX 635

Filters
Air Cleaner .......................... .569
Air Conditioning ...................... .402
Engine Oil ........................... .569
Engine Oil Disposal .................... .568
Flashers
Hazard Warning ...................... .538
Turn Signal .......................... .103
Flash-To-Pass ........................... .170
Flooded Engine Starting .....................411
Fluid Capacities ......................... .610
Fluid Leaks ............................ .103
Fluid Level Checks ....................... .590
Engine Oil ........................... .566
Manual Transmission ................... .589
Power Steering ....................... .451
Fluids, Lubricants and Genuine Parts ...........611
Fog Lights ............................. .170
Fog Light Service ........................ .608 Fold and Tumble Rear Seat ................. .161
Folding Rear Seat ........................ .164
Folding Windshield ....................... .286
Four-Way Hazard Flasher .................. .538
Four Wheel Drive ........................ .428
Four Wheel Drive Operation ................ .428
Freeing A Stuck Vehicle .................... .552
Front Axle (Differential) .................... .590
Fuel .................................. .506
Adding ............................. .510
Additives ........................... .509
Clean Air ........................... .507
Ethanol ............................. .507
Filler Cap (Gas Cap) ................... .510
Gasoline ............................ .506
Gauge .............................. .300
Materials Added ...................... .509
Methanol ........................... .507
Octane Rating ........................ .506
10 INDEX 639