fuel additives JEEP WRANGLER 2007 JK / 3.G Owners Manual

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 shownto reduce spark plug life and reduce emission system
performance in some vehicles. The manufacturer recom-
mends using gasolines without MMT. Since the MMT
content of gasoline may not be indicated on the pump,
you should ask your gasoline retailer whether or not
his/her 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 reformu-
lated gasolines.
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 are not needed under
normal conditions and would result in additional cost.
Therefore you should not have to add anything to the
fuel.
STARTING AND OPERATING 323
5

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

Engine Oil Selection
For best performance and maximum protection for all
engines under all types of operating conditions, the
manufacturer recommends engine oils that are API Cer-
tified and meet the requirements of DaimlerChrysler
Material Standard MS-6395.
American Petroleum Institute (API) Engine Oil
Identification Symbol
This symbol means that the oil has
been certified by the American
Petroleum Institute (API). The
manufacturer only recommends
API Certified engine oils.
Engine Oil Viscosity (3.8L Engines)
SAE 5W-20 engine oil is recommended for all operating
temperatures. This engine oil improves low tempera-
ture starting and vehicle fuel economy. Your engine oil
filler cap shows the recommended engine oil viscosity
for your vehicle.
Lubricants which do not have both, the engine oil certi-
fication mark and the correct SAE viscosity grade num-
ber should not be used.
Materials Added To Engine Oils
The manufacturerstrongly recommendsagainst the ad-
dition of any additives (other than leak detection dyes) to
engine oil. Engine oil is an engineered product and it’s
performance may be impaired by supplemental addi-
tives.
Disposing of Used Engine Oil
Care should be taken in disposing of used engine oil from
your vehicle. Used oil, indiscriminately discarded, can
MAINTAINING YOUR VEHICLE 371
7

ABS (Anti-Lock Brake System)............204,296
Adding Fuel........................... 325
Adding Washer Fluid..................... 194
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 375
Air Conditioner Maintenance............... 376
Air Conditioning.....................254,258
Air Conditioning Controls................. 258
Air Conditioning, Operating Tips............ 258
Air Conditioning Refrigerant............... 377
Air Conditioning System.................. 258
Air Filter.............................. 375
Air Pressure, Tires....................... 309
Airbag................................ 47
Airbag Deployment....................... 60
Airbag Light.........................62,204
Airbag Maintenance....................... 61
Airbag, Side............................ 58
Alarm (Security Alarm).................... 19
Alignment and Balance................... 315Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 248
Antifreeze (Engine Coolant)................ 412
Anti-Lock Brake System (ABS)............107,296
Anti-Lock Warning Light.................. 204
Appearance Care........................ 393
Arming Theft System (Security Alarm)......... 19
Auto Down Power Windows................ 33
Automatic Transmission................... 388
Fluid and Filter Changes................. 388
Fluid Level Check...................... 388
Fluid Type........................... 388
Gear Ranges.......................... 276
Shifting............................. 275
Special Additives...................... 390
Torque Converter...................... 280
Auxiliary Electrical Outlet (Power Outlet)....... 116
Auxiliary Power Outlet.................... 116
Axle Lock..........................285,286
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