Do Not Use E-85 In Non-Flex Fuel Vehicles; Materials Added To Fuel; Flexible Fuel (2.4L Engine Only) - If Equipped; E-85 General Information - Jeep CHEROKEE 2018 User Manual

While operating on gasoline with an octane
number of 87, hearing a light knocking sound
from the engine is not a cause for concern.
However, if the engine is heard making a
heavy knocking sound, see your dealer imme-
diately. Use of gasoline with an octane num-
ber lower than 87 can cause engine failure
and may void or not be covered by the New
Vehicle Limited Warranty.
Poor quality gasoline can cause problems
such as hard starting, stalling, and hesita-
tions. If you experience these symptoms, try
another brand of gasoline before considering
service for the vehicle.
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 con-
tent 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:
248
• 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.

Materials Added To Fuel

Designated TOP TIER
Detergent Gasoline
contains a higher level
of detergents to fur-
ther aide in minimiz-
ing 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.
Indiscriminate use of fuel system cleaning
agents should be avoided. Many of these
materials intended for gum and varnish re-
moval may contain active solvents or similar
ingredients. These can harm fuel system gas-
ket and diaphragm materials.
FLEXIBLE FUEL (2.4L
ENGINE ONLY) — IF
EQUIPPED

E-85 General Information

The information in this section is unique for
Flexible Fuel vehicles only. These vehicles can be
identified by a unique fuel filler door label that
states Ethanol (E-85) or Unleaded Gasoline Only
and/or a yellow fuel cap. Refer to the Owner's
Manual at www.mopar.com/en-us/care/
owners-manual.html (U.S. Residents) or
www.owners.mopar.ca (Canadian Residents)
for further information.
CAUTION!
Only vehicles with the E-85 fuel filler door
label or a yellow gas cap can operate on
E-85.