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FUEL REQUIREMENTS —
GASOLINE ENGINE
3.6L Engine
Do not use E-85 flex fuel or ethanol blends
greater than 15% in this engine.
T
hese engines are de-
signed to meet all emis-
sions regulations and
provide optimum fuel
economy and perfor-
mance when using high
quality unleaded “Regu-
lar” 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 an 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.
5.7L Engine
Do not use E-85 flex fuel or ethanol blends
greater than 15% in this engine.
T
his engine is designed
to meet all emissions
regulations and pro-
vide satisfactory fuel
economy and perfor-
mance when using high-
quality unleaded gaso-
line having an octane
range of 87 to 89 as specified by the (R+M)/
2 method. The use of 89 octane “Plus” gaso-
line is recommended for optimum performance
and fuel economy.
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.
6.2L Supercharged And 6.4L Engine
Do not use E-85 flex fuel or ethanol blends
greater than 15% in this engine.
These engines are de-
signed to meet all
emissions regulations,
provide optimal fuel
economy and perfor-
mance when using
high-quality unleaded
RECOMMENDED OCTANE RATING
(R+M)/2 METHOD
87
RECOMMENDED OCTANE RATING
(R+M)/2 METHOD
89
RECOMMENDED OCTANE RATING
(R+M)/2 METHOD
91
279
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