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FUEL REQUIREMENTS
2.4L and 2.7L Engine
The 2.4L and 2.7L engines are designed to
meet all emission regulations and provide
excellent fuel economy and performance
when using high quality unleaded “regu-
lar” gasolines having an octane rating of
87. The use of premium gasoline is not
recommended. Under normal conditions, the use of
premium gasoline will not provide a benefit over high
quality unleaded “regular” gasolines, and in some cir-
cumstances may result in poorer performance.
3.5L Engine
The 3.5L engine is designed to meet all
emissions regulations and provide satisfac-
tory fuel economy and performance when
using high-quality unleaded gasoline having an octane
range of 89. The manufacturer recommends the use of
89 octane for optimum performance. The use of premium
gasoline is not recommended. Under normal conditions,
the use of premium gasoline will not provide a benefit
over high quality unleaded “regular” and “mid-grade”
gasolines, and in some circumstances may result in
poorer performance.
Light spark knock at low engine speeds is not harmful to
your engine. However, continued heavy spark knock at
high speeds can cause damage and immediate service is
required.
Poor quality gasoline can cause problems such as hard
starting, stalling, and hesitations. If you experience these
symptoms, try another brand of gasoline (with the ap-
propriate octane rating for your engine) before consider-
ing service for the vehicle.
STARTING AND OPERATING 325
5
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