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TECHNICAL SPECIFICATIONS 289
FUEL REQUIREMENTS
3.6L Engine
Do not use E-85 flex fuel or ethanol blends
greater than 15% in this engine.
This engine is designed to meet all
emissions regulations and provide
excellent fuel economy and perfor-
mance when using high-quality
unleaded “Regular” gasoline having an octane
rating of 87 as specified by the (R+M)/2
method. The use of higher octane “Premium”
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 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 expe-
rience these symptoms, try another brand of gaso-
line before considering service for the vehicle.
5.7L Engine (With Automatic Transmission)
Do not use E-85 flex fuel or ethanol blends
greater than 15% in this engine.
This engine is designed to meet all
emissions regulations and provide
satisfactory fuel economy and perfor-
mance when using high quality
unleaded gasoline having a posted octane
number range of 87 to 89 as specified by the
(R+M)/2 method. The use of 89 octane “Plus”
gasoline is recommended for optimum perfor-
mance 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 immediately.
Use of gasoline 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.
5.7L Engine (With Manual Transmission)
Do not use E-85 flex fuel or ethanol blends
greater than 15% in this engine.
This engine is designed to meet all
emission regulations, provide optimal
fuel economy and performance when
using high-quality unleaded
“Premium” gasoline having a posted octane
number of 91 as specified by the (R+M)/2
method. The use of 91 or higher octane
“Premium” gasoline is required for this engine.
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 hesitations. If you expe-
rience these symptoms, try another brand of gaso-
line before considering service for the vehicle.
8
20_LA_OM_EN_USC_t.book Page 289
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