octane JEEP COMMANDER 2009 1.G Owners Manual

FUEL REQUIREMENTS
3.7/4.7L Engine (If Equipped)
All engines (except 5.7L engines) are de-
signed to meet all emissions regulations
and provide excellent fuel economy and
performance when using high-quality un-
leaded “regular” gasoline having an oc-
tane rating of 87. The use of premium
gasoline is not recommended. Under normal conditions,
the use of premium gasoline will not provide a benefit
over high-quality regular gasoline, and in some circum-
stances may result in poorer performance.
5.7L Engine (If Equipped)
The 5.7L engine is designed to meet all
emissions regulations and provide satisfac-
tory fuel economy and performance whenusing high-quality unleaded gasoline having an octane
range of 87 to 89. The manufacturer recommends the use
of 89 octane for optimum performance. The use of
premium gasoline is not recommended. Under normal
conditions, the use of premium gasoline will not provide
a benefit over high-quality regular and mid-grade gaso-
line, and in some circumstances may result in poorer
performance.
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 experience these
symptoms, try another brand of gasoline before consid-
ering service for the vehicle.
STARTING AND OPERATING 367
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E-85 Usage In Non-Flex Fuel Vehicles
Non-FFV vehicles are compatible with gasoline contain-
ing 10% ethanol (E10). Gasoline with higher ethanol
content may void the vehicle’s warranty.
If a Non-FFV vehicle is inadvertently fueled with E-85
fuel, the engine will have some or all of these symptoms:
•operate in a lean mode
•OBD II “Malfunction Indicator Light” on
•poor engine performance
•poor cold start and cold drivability
•increased risk for fuel system component corrosion
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 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 if the
gasoline contains MMT.
STARTING AND OPERATING 369
5

It is even more important to look for gasoline 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 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 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 performance
and 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 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 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.
370 STARTING AND OPERATING

CAUTION!
Only vehicles with the E-85 fuel filler cap (gas cap)
can operate on E-85.
ETHANOL FUEL (E-85)
E-85 is a mixture of approximately 85% fuel ethanol and
15% unleaded gasoline.
WARNING!
Ethanol vapors are extremely flammable and could
cause serious personal injury. Never have any smok-
ing materials lit in or near the vehicle when remov-
ing the fuel filler tube cap (gas cap) or filling the
tank. Do not use E-85 as a cleaning agent and never
use it near an open flame.
Fuel Requirements
If your vehicle is E-85 compatible, it will operate on
unleaded gasoline with an octane rating of 87, or E-85
fuel, or any mixture of these two fuels.
E-85 Badge
STARTING AND OPERATING 373
5

FLUIDS, LUBRICANTS, AND GENUINE PARTS
Engine
Component Fluid, Lubricant, or Genuine Part
Engine Coolant MOPARAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid
Organic Additive Technology)
Engine Oil (3.7L/4.7L/5.7L En-
gines)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.
Oil Filter (All Engines) MOPAREngine Oil Filter (P/N 04884899AB) or equivalent
Spark Plugs (3.7L Engine) ZFR6F-11G (Gap 0.043 in [1.09 mm])
Spark Plugs (4.7L Engine) Upper Bank — FR8TE2 (Gap 0.040 in [1.02 mm]) Lower Bank — FR8T1332
(Gap 0.050 in [1.27 mm])
Spark Plugs (5.7L Engine) LZFR5C–11 (Gap 0.043 in [1.09 mm])
Fuel Selection (3.7L and 4.7L En-
gines)87 Octane
Fuel Selection (5.7L Engines) 87 Octane Acceptable - 89 Octane Recommended
466 MAINTAINING YOUR VEHICLE

Folding Rear Seat.....................128,132
Four Wheel Drive....................... 307
Operation........................... 307
Systems............................. 307
Four Wheel Drive Operation................ 307
Four-Way Hazard Flasher.................. 400
Freeing A Stuck Vehicle................... 306
Front Axle (Differential)................... 438
Front Heated Seats....................... 125
Fuel................................. 367
Filler Cap (Gas Cap).................... 375
Gasoline............................ 367
Gauge.............................. 199
Materials Added....................... 370
Octane Rating........................ 367
Requirements......................... 465
Tank Capacity........................ 465
Fuel, Flexible.............See Flexible Fuel Vehicles
Fuel System Caution................370,376,377Fuses................................ 449
Garage Door Opener (HomeLink) ........... 162
Gas Cap (Fuel Filler Cap)............375,377,418
Gasoline (Fuel)......................... 367
Gasoline, Reformulated................... 368
Gasoline/Oxygenate Blends................ 368
Gauges
Coolant Temperature................... 196
Fuel............................... 199
Speedometer......................... 191
Tachometer.......................... 194
Gear Ranges........................... 299
General Information...............20,26,116,366
Glass Cleaning.......................... 448
Gross Axle Weight Rating...............378,381
Gross Vehicle Weight Rating.............378,380
GVWR............................... 378
502 INDEX

New Vehicle Break-In Period................ 73
Occupant Restraints....................... 42
Octane Rating, Gasoline (Fuel).............. 367
Odometer..........................197,198
Trip ................................ 197
Off-Pavement Driving (Off-Road)..........313,443
Off-Road Driving (Off-Pavement)..........313,443
Oil Change Indicator..................... 205
Oil Change Indicator, Reset................. 205
Oil, Engine............................ 422
Capacity............................ 465
Change Interval....................... 422
Dipstick............................. 422
Disposal............................ 424
Filter............................... 424
Filter Disposal........................ 424
Identification Logo..................... 423
Materials Added to..................... 424Recommendation...................423,465
Synthetic............................ 424
Viscosity.........................423,465
Onboard Diagnostic System..............418,419
Opener, Garage Door (HomeLink) ........... 162
Operator Manual (Owner’s Manual)............ 6
Outside Rearview Mirrors.................. 85
Overdrive............................. 302
Overdrive OFF Switch.................... 302
Overhead Console....................... 162
Overheating, Engine...................196,400
Owner’s Manual (Operator Manual).........6,491
Paint Care............................. 444
Paint Damage.......................... 444
Panic Alarm............................ 24
Park Sense System, Rear................... 156
Parking Brake.......................... 318
Passing Light........................... 146
INDEX 507
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