2016 JEEP GRAND CHEROKEE fuel additives

•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.
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
Besides using unleaded gasoline with the proper octane
rating, gasolines that contain detergents, corrosion and
stability additives are recommended. Using gasolines
that have these additives will help improve fuel
economy, reduce emissions, and maintain vehicle perfor-
mance.
Designated TOP TIER Detergent Gaso-
line contains a higher level of deter-
gents to further aide in minimizing
engine and fuel system deposits.
When available, the usage of Top Tier
Detergent gasoline is recommended.
Visit www.toptiergas.com for a list of
TOP TIER Detergent Gasoline Retailers.
5
STARTING AND OPERATING 557

Indiscriminate use of fuel system cleaning agents should
be avoided. Many of these materials intended for gum
and varnish removal may contain active solvents or
similar ingredients. These can harm fuel system gasket
and diaphragm materials.
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 per-
formance 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
(Continued)
CAUTION! (Continued)
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.
• 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 and may void or not be covered
under the New Vehicle Limited Warranty.
NOTE: Intentional tampering with the emissions control
system can result in civil penalties being assessed against
you.
558 STARTING AND OPERATING

About Your Brakes....................... .500
Adaptive Cruise Control (ACC) (Cruise Control) . . .191
Adding Engine Coolant (Antifreeze) ............641
Adding Fuel ............................ .559
Additives, Fuel .......................... .557
Adjust Down .............................. .146
Forward ......................... .144, 146
Rearward ........................ .144, 146
Up ................................ .146
AirBag.................................68 Advance Front Air Bag .................68, 70
Air Bag Operation .......................71
Air Bag Warning Light ....................79
Driver Knee Air Bag ......................72
Enhanced Accident Response ................79
Event Data Recorder (EDR) .................82
FrontAirBag...........................68
If A Deployment Occurs ...................77 Knee Impact Bolsters
.....................72
Maintaining Your Air Bag System ............81
Redundant Air Bag Warning Light ............81
Side Air Bags ...........................72
Transporting Pets ...................... .107
Air Bag Deployment ........................68
Air Bag Light ..................... .79, 111, 294
Air Bag Maintenance .......................81
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . .618
Air Conditioner Maintenance .................624
Air Conditioning Filter ...............436, 619, 625
Air Conditioning, Operating Tips ...........434, 437
Air Conditioning Refrigerant ..............624, 625
Air Conditioning System .................433, 624
Air Pressure, Tires ........................ .534
Alarm Arm The System ........................21
Disarm The System .......................21
Alarm, Panic .............................25
700 INDEX

Flashers............................... .582
Hazard Warning ....................... .582
Turn Signal ..................113, 316, 670, 672
Flooded Engine Starting ....................466
Fluid, Brake ............................ .677
Fluid Capacities ......................... .675
Fluid Leaks .............................113
Fluid Level Checks Brake ............................... .646
Cooling System ........................ .639
Engine Oil ........................... .614
Fluids, Lubricants And Genuine Parts ...........676
Fog Lights ............................. .671
Fog Light Service ........................ .671
Folding Rear Seat ........................ .159
Forward Collision Warning ..................217
Four-Way Hazard Flasher ...................582
Freeing A Stuck Vehicle .....................600
Front Axle (Differential) .....................647 Fuel
.................................. .555
Adding ............................. .559
Additives ............................ .557
Clean Air ............................ .555
Economy Mode ....................... .470
Ethanol ............................. .556
Gasoline ............................. .555
Light ............................... .312
Materials Added ....................... .557
Methanol ............................ .556
Octane Rating ..................... .555, 676
Requirements ...................... .555, 675
Tank Capacity ......................... .675
Fueling ............................... .559
Fuses ................................. .657
Garage Door Opener (HomeLink) ..........250, 257
Gasoline,

Clean Air ....................... .555
Gasoline (Fuel) .......................... .555
706 INDEX