2015 JEEP CHEROKEE fuel additives

•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
Methylcyclopentadienyl Manganese Tricarbonyl (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 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.
582 STARTING AND OPERATING

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.
5
STARTING AND OPERATING 583

•Some additives used in regular gasoline are not fully
compatible with E-85 and may form deposits in your
engine. To eliminate driveability issues that may be
caused by these deposits, a supplemental gasoline
additive, such as MOPAR® Injector Cleanup or
Techron may be used.
Selection Of Engine Oil For Flexible Fuel Vehicles
(E-85) And Gasoline Vehicles
FFV vehicles operated on E-85 require specially formu-
lated engine oils. These special requirements are included
in MOPAR® engine oils, and in equivalent oils meeting
Chrysler Specification MS-6395. The manufacturer only
recommends engine oils that are API Certified and meet
the requirements of Material Standard MS-6395. MS-6395
contains additional requirements, developed during ex-
tensive fleet testing, to provide additional protection to
Chrysler Group LLC engines. Use MOPAR® or an
equivalent oil meeting the specification MS-6395.
Starting
The characteristics of E-85 fuel make it unsuitable for use
when ambient temperatures fall below 0°F (-18°C). In the
range of 0°F (-18°C) to 32°F (0°C), you may experience an
increase in the time it takes for your engine to start, and
a deterioration in driveability (sags and/or hesitations)
until the engine is fully warmed up.
NOTE:Use of the engine block heater (if equipped) is
beneficial for E-85 startability when the ambient tempera-
ture is less than 32°F (0°C).
Cruising Range
Because E-85 fuel contains less energy per gallon/liter
than gasoline, you will experience an increase in fuel
consumption. You can expect your miles per gallon
(mpg)/miles per liter and your driving range to decrease
by about 30%, compared to gasoline operation.
5
STARTING AND OPERATING 587

Engine Oil Viscosity (SAE Grade) — 2.4L Engine
MOPAR® SAE 0W-20 engine oil or equivalent Pennzoil®
or Shell Helix® is recommended for all operating tem-
peratures. This engine oil improves low temperature
starting and vehicle fuel economy. Your engine oil filler
cap also states the recommended engine oil viscosity
grade for your engine.
Lubricants which do not have both the engine oil certi-
fication mark and the correct SAE viscosity grade num-
ber should not be used.
Engine Oil Viscosity (SAE Grade) — 3.2L Engine
MOPAR® SAE 5W-20 engine oil or equivalent Pennzoil®
or Shell Helix® is recommended for all operating tem-
peratures. 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 engine. For information on engine oil filler cap
location, refer to “Engine Compartment” in “Maintaining
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.
7
MAINTAINING YOUR VEHICLE 663

About Your Brakes........................518
ABS (Anti-Lock Brake System)................519
Adaptive Cruise Control (ACC) (Cruise Control) . . .191
Adding Engine Coolant (Antifreeze)............688
Additives, Fuel...........................582
Air bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Air Bag
Advance Front Air Bag....................66
Air Bag Components.....................65
Air bag Operation.......................69
Air Bag Warning Light....................70
Driver Knee Air Bag......................79
Enhanced Accident Response................87
Event Data Recorder (EDR).................91
Front Air Bag . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Front Passenger Knee Air bag...............79
If A Deployment Occurs...................85
Knee Impact Bolsters.....................79
Lighter Weight Passengers..................73
Maintaining Your Air Bag System............90
Occupant Classification Module (OCM)........71
Redundant Air Bag Warning Light............89
Side Air Bags...........................80
Transporting Pets.......................115
Air bag Deployment........................65
Air bag Light.............................87
Air bag Maintenance........................90
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . .664
Air Conditioner Maintenance.................670
Air Conditioning..........................426
Air Conditioning Controls...................426
Air Conditioning Filter.....................448
Air Conditioning, Operating Tips..............447
Air Conditioning Refrigerant.................670
Air Conditioning System....................426
Air Filter...............................664
Air Pressure, Tires.........................553
748 INDEX

Forward Collision Warning..................218
Four Wheel Drive.........................503
Freeing A Stuck Vehicle.....................644
Fuel...................................579
Additives.............................582
Clean Air.............................580
Economy Mode........................484
Ethanol..............................580
Filler Cap (Gas Cap).....................588
Gasoline..............................579
Gauge...............................338
Materials Added........................582
Methanol.............................580
Octane Rating..........................579
Requirements..........................579
Specifications..........................728
Tank Capacity..........................727
Fuel, Flexible............................584
Fuses..................................705
Garage Door Opener (HomeLink®)............288
Gas Cap (Fuel Filler Cap)...................588
Gasoline, Clean Air........................580
Gasoline (Fuel)...........................579
Gasoline, Reformulated.....................580
Gauges
Coolant Temperature.....................338
Fuel.................................338
Speedometer..........................335
Tachometer............................331
Gear Ranges.............................486
Gear Select Lever Override..................647
General Information.......................425
Glass Cleaning...........................703
Gross Axle Weight Rating...................594
Gross Vehicle Weight Rating..................593
10
INDEX 755