2013 JEEP WRANGLER octane

FUEL REQUIREMENTS
3.6L Engine
This engine is designed to meet all emis-
sions regulations and provide excellent fuel
economy and performance when using
high-quality unleaded “regular” gasoline
having an octane rating of 87. The use of
premium gasoline is not recommended, as it will not
provide any benefit over regular gasoline in these engines.
Light 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 experi-
ence these symptoms, try another brand of gasoline
before considering service for the vehicle. Over 40 auto manufacturers worldwide have issued and
endorsed consistent gasoline specifications (the World-
wide Fuel Charter, WWFC) which define fuel properties
necessary to deliver enhanced emissions, performance,
and durability for your vehicle. The manufacturer recom-
mends the use of gasolines that meet the WWFC speci-
fications if they are available.
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.5
STARTING AND OPERATING 513

To fix a Non-FFV vehicle inadvertently fueled once with
E-85 perform the following:
•drain the fuel tank (see your authorized dealer)
• change the engine oil and oil filter
• disconnect and reconnect the battery to reset the
engine controller memory
More extensive repairs will be required for prolonged
exposure to E-85 fuel.
MMT In Gasoline
MMT (Methylcyclopentadienyl Manganese Tricarbonyl)
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 emissions 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
the gasoline contains MMT. MMT is prohibited 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
and they would result in additional cost. Therefore, you
should not have to add anything to the fuel.5
STARTING AND OPERATING 515

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.
• 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 ser-
vice. Contact your authorized dealer for service
assistance.
(Continued)
CAUTION! (Continued)
•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 perfor-
mance problems resulting from the use of such
fuels or additives is not the responsibility of the
manufacturer.
NOTE:
Intentional tampering with the emissions control
system can result in civil penalties being assessed against
you.
516 STARTING AND OPERATING

FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine
ComponentFluid, Lubricant, or Genuine Part
Engine Coolant We recommend you use MOPAR® Antifreeze/Coolant 10 Year/
150,000 Mile Formula OAT (Organic Additive Technology) or equivalent
meeting the requirements of Chrysler Material Standard MS-12106.
Engine Oil We recommend you use API Certified SAE 5W-20 Engine Oil, meeting the
requirements of Chrysler Material Standard MS-6395. Refer to your engine
oil filler cap for correct SAE grade.
Engine Oil Filter We recommend you use MOPAR® Engine Oil Filter or equivalent.
Spark Plugs We recommend you use MOPAR® Spark Plugs (Gap 0.043 in [1.1 mm])
Fuel Selection 87 Octane
7
MAINTAINING YOUR VEHICLE 619

Gasoline............................. .513
Gauge .............................. .304
Materials Added ....................... .515
Methanol ............................ .514
Octane Rating ......................... .513
Requirements ......................... .513
Tank Capacity ......................... .618
Fueling ............................... .517
Fuses ................................. .607
Gas Cap (Fuel Filler Cap) ...................517
Gasoline, Clean Air ....................... .513
Gasoline (Fuel) .......................... .513
Gasoline, Reformulated .....................513
Gauges Coolant Temperature .....................309
Fuel ................................ .304
Odometer ............................ .312
Speedometer ......................... .304Tachometer
........................... .308
Gear Ranges ............................ .419
Gear Select Lever Override ..................562
General Information ........................21
Glass Cleaning .......................... .603
Gross Axle Weight Rating ...................523
Gross Vehicle Weight Rating ..................522
GVWR ................................ .520
Hands-Free Phone (Uconnect®) ...............115
HardTop.............................. .206
Hard Top, Modular ....................... .206
Hard Top Removal ....................... .214
Hazard Warning Flasher ....................546
Headlights Automatic ........................... .170
Bulb Replacement ...................... .615
High Beam ........................... .172
High Beam/Low Beam Select Switch .........172
650 INDEX

Maintenance Schedule..................... .622
Malfunction Indicator Light (Check Engine) .......315
Manual, Service ......................... .638
Manual Transmission ..................... .418
Fluid Level Check ...................... .598
Lubricant Selection ..................... .597
Shift Speeds .......................... .419
Master Cylinder (Brakes) ....................593
Methanol .............................. .514
Mini-Trip Computer ...................... .319
Mirrors .................................111
Automatic Dimming .....................113
Electric Powered ........................114
Electric Remote .........................114
Heated ...............................114
Outside ..............................112
Rearview .............................111
Vanity ...............................115
Modifications/Alterations, Vehicle ...............9Modular Hard Top
....................... .206
Monitor, Tire Pressure System ................501
Mopar Parts ............................ .572
MTBE/ETBE ........................... .514
New Vehicle Break-In Period ..................99
Occupant Restraints ........................47
Octane Rating, Gasoline (Fuel) ................513
Odometer .............................. .312
Trip ................................ .310
Oil Change Indicator ...................... .315
Oil Change Indicator, Reset ..................315
Oil, Engine ............................. .574
Capacity ............................ .618
Change Interval ....................... .329
Dipstick ............................. .574
Disposal ............................. .576
Filter ............................... .576
654 INDEX