User Manual - Page 535

For 2019 Wrangler.

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TECHNICAL SPECIFICATIONS 533
(Continued)
Do Not Use E-85 In Non-Flex Fuel Vehicles
Non-Flex Fuel Vehicles (FFV) are compatible with gasoline
containing up to 15% ethanol (E-15). Use of gasoline with
higher ethanol content may void the New Vehicle Limited
Warranty.
If a Non-FFV vehicle is inadvertently fueled with E-85 fuel,
the engi
ne will have some or all of these symptoms:
Operate in a lean mode.
OBD II
Malfunction Indicator Light on.
Poor e
ngine performance.
Poor c
old start and cold drivability.
Increa
sed risk for fuel system component corrosion.
CNG And LP Fuel System Modifications
Modifications that allow the engine to run on Compressed
Natural Gas (CNG) or Liquid Propane (LP) may result in
damage to the engine, emissions, and fuel system compo
-
nents. Problems that result from running CNG or LP are not
the res
ponsibility of the manufacturer 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 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 gaso
-
line retailer whether the gasoline contains MMT. MMT is
p
rohibi
ted in Federal and California reformulated gasoline.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performa
nce:
The use of leaded gasoline is prohibited by Federal
law. U
sing leaded gasoline can impair engine perfor-
mance and damage the emissions control system.
8
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