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FUEL REQUIREMENTS
2.4L and 2.7L Engines
2.4L and 2.7L Engines are designed to meet
all emissions regulations and provide ex-
cellent fuel economy and performance
when using high-quality unleaded “regu-
lar” gasoline having an octane rating of 87.
The use of premium gasoline is not recom-
mended. Under normal conditions, the use of premium
gasoline will not provide a benefit over high-quality
unleaded regular gasolines, and in some circumstances
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 hav-
ing an octane range of 87 to 89. The manu-
facturer recommends the use of 89 octane
for optimum performance. The use of pre-
mium gasoline is not recommended. Un-
der normal conditions, the use of premium
gasoline will not provide a benefit over
high-quality regular and mid-grade gaso-
lines, 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
368 STARTING AND OPERATING
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