FUEL REQUIREMENTS; Torque Patterns; RECOMMENDED OCTANE RATING- Page 257

2018 Jeep Wrangler JL User Guide

Table of Contents

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Tighten the lug nuts/bolts in a star pattern
until each nut/bolt has been tightened twice.
Ensure that the socket is fully engaged on the
lug nut/bolt (do not insert it halfway).

After 25 miles (40 km), check the lug nut/
bolt torque to be sure that all the lug nuts/
bolts are properly seated against the wheel.

WARNING!

To avoid the risk of forcing the vehicle off
the jack, do not tighten the lug nuts/bolts
fully until the vehicle has been lowered.
Failure to follow this warning may result in
personal injury.

FUEL REQUIREMENTS

2.0L Engine

This engine is designed
to meet all emission
regulations, and pro-
vide satisfactory fuel
economy

and

perfor-

mance

when

using

high-quality

unleaded

“Regular” gasoline hav-

ing a posted octane number of 87 as speci-
fied by the (R+M)/2 method. For optimal
performance the use of 91 or higher octane
“Premium” gasoline is recommended in
these engines.

While operating on gasoline with the required
octane number, 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 immediately. Use of gasoline with a
lower than recommended octane number 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.

3.6L Engine

This engine is designed
to meet all emissions
regulations and provide
excellent fuel economy
and performance when
using high-quality un-
leaded “Regular” gaso-
line having an octane

rating of 87 as specified by the (R+M)/
2 method. The use of higher octane “Pre-
mium” gasoline will not provide any benefit
over “Regular” gasoline in these engines.

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-

Torque Patterns

RECOMMENDED OCTANE RATING

(R+M)/2 METHOD

91

RECOMMENDED OCTANE RATING

(R+M)/2 METHOD

87

255

Detailed Information for 2018 Jeep Wrangler JL User Guide

Lists of information found in 2018 Jeep Wrangler JL User Guide - Page 257

  • 2.0L Engine This engine is designed to meet all emission regulations, and pro- vide satisfactory fuel economy and perfor- mance when using high-quality unleaded “Regular” gasoline hav- ing a posted octane number of 87 as speci- fied by the (R+M)/2 method.
  • 3.6L Engine This engine is designed to meet all emissions regulations and provide excellent fuel economy and performance when using high-quality un- leaded “Regular” gaso- line having an octane rating of 87 as specified by the (R+M)/ 2 method.

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