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504 TECHNICAL SPECIFICATIONS
FUEL REQUIREMENTS
2.0L Engine
This engine is designed to meet all emission require-
ments, and provide satisfactory fuel economy and
performance, when using high-quality unleaded
“regular” gasoline having an octane rating of 87, as specified
by the (R+M)/2 method. The use of 91 or higher octane
“premium” gasoline will allow these engines to operate to
optimal performance. This increase in performance is most
noticeable in hot weather or other heavier load conditions,
such as while towing.
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 immedi-
ately. 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 hesitations. If you experience these
symptoms, try another brand of gasoline before considering
service for the vehicle.
2.4L & 3.2L Engines
These engine are designed to meet all emissions
regulations and provide optimum fuel economy and
performance when using high quality unleaded
“Regular” gasoline having a posted octane number of 87 as
specified by the (R+M)/2 method. The use of higher octane
“Premium” gasoline is not required, as it 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 immediately. Use of gaso-
line with an octane number 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 hesitations. If you experience these
symptoms, try another brand of gasoline before considering
service for the vehicle.
Reformulated Gasoline
Many areas of the country require the use of cleaner burning
gasoline referred to as “Reformulated Gasoline”. Reformu-
2020_JEEP_CHEROKEE_OM_USA=GUID-B9F8E23F-10A5-4D6C-A585-BCFF41CCB747=1=en=.book Page 504
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