Jeep WRANGLER 2020, Owner'S Manual

Page: 421 / 548

TECHNICAL SPECIFICATIONS 419
(Continued)
D
O
N
OT
U
SE
E-85 I
N
N
ON
-F
LEX
F
UEL
V
EHICLES
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 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
CNG A
ND
LP F
UEL
S
YSTEM
M
ODIFICATIONS
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 components. Problems that result
from running CNG or LP are not the responsibility of
the manufacturer and may void or not be covered
under the New Vehicle Limited Warranty.
M
ETHYLCYCLOPENTADIENYL
M
ANGANESE
T
RICARBONYL
(MMT) I
N
G
ASOLINE
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 whether or not
his/her gasoline contains MMT.
F
UEL
S
YSTEM
C
AUTIONS
NOTE:
Intentional tampering with the emissions
control system can result in civil penalties being
assessed against you.
CAUTION!
Follow these guidelines to maintain your
vehicle’s performance:

The use of leaded gasoline is prohibited by
law. Using leaded gasoline can impair
engine performance and damage the emis-
sions control system.

An out-of-tune engine or certain fuel or igni-
tion 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
an authorized dealer for service assistance.

The use of fuel additives, which are now being
sold as octane enhancers, is not recom-
mended. Most of these products contain high
concentrations of methanol. Fuel system
damage or vehicle performance problems
resulting from the use of such fuels or addi-
tives is not the responsibility of the manufac-
turer and may void or not be covered under
the New Vehicle Limited Warranty.
CAUTION!
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