User Manual - Page 346

For 2024 JEEP WRANGLER.

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GASOLINE/OXYGENATE BLENDS
Some fuel supplie rs blend unleaded gasoline with oxy-
genates such as ethanol.
CAUTION!
DO NOT use E-85, gasoline containing methanol, or
gasoline containing more than 15% ethanol (E-15).
Use of these blends may result in starting and driv-
ability problems, damage cr it ical fuel system compo-
nents, cause e missi ons to exceed the applicable
standard, and/or cause the Malfunction Indicator
Light to illuminate. Please observe pump labels as
they should clearly communicate if a fuel contains
greater than 15% ethanol (E-15).
Problems that result from using gasoline cont aini ng
more than 15% ethanol (E-15) or gasoline containing
methanol are not the responsibility of the manufacturer
and may void or not be covered under New Vehicle Lim-
ited Warranty.
DO NOT USE E-85 IN NON-FLEX
FUEL VEHICLES
Non-Flex Fuel Vehicles (FFV) are compatible with gaso-
line containing up to 15% ethanol (E-15). Use of gaso-
line with highe r ethanol content may void the New
Vehicle Limited 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 le an mode
OBD II Malfunctio n Indicator Light on
Poor engine performance
Poor cold start and cold drivability
Increased risk for fuel system component corrosion
CNG AND LP FUEL SYSTEM
MODIFICATIONS
Modifications that allow the engine to run on Com-
pressed Natural Gas (CNG) or Liquid Propane (LP) may
result in d amage to the engine, emissions, and fuel
system components. Problems that result from running
CNG or LP are not the responsibility of the manufac-
turer and may void or not be covered under the New
Vehicle Limited Warranty.
MMT IN GASOLINE
Methylcyclopentadienyl Manganese Tricarbonyl (MMT) is a
manganese-containing metallic additive that is blended
into some gasolines to increase octane. Gasoline blended
with MMT provides no performance advantage beyond
gasoline of the same octane number without MMT. Gaso-
line blended wi th 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 o f gaso-
line 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.
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 cat alyti c 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 an authorized d eale r for service
assistance.
The use of fuel additives, which are now being sold
as octane enhance rs, is not recommended. Most
of these products contain high conc entr ati ons of
methanol. Fuel system damage or vehicle perfor-
mance problems resulting from the use of such
fuels or ad di tives 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 i n civil penalties being assessed against you.
344 TECHNICAL SPECIFICATIONS
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