Fuel System Cautions - Jeep Wrangler Owner's Manual

464 STARTING AND OPERATING

Fuel System Cautions

CAUTION!
Follow these guidelines to maintain your vehicle's
performance:
• The use of leaded gasoline is prohibited by Fed-
eral law. Using leaded gasoline can impair engine
performance, and damage the emission control
system.
• An out-of-tune engine, or certain fuel or ignition
malfunctions, can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune
or malfunctioning and may require immediate
service. Contact your authorized dealer for service
assistance.
• The use of fuel additives which are now being
sold as octane enhancers is not recommended.
Most of these products contain high concentra-
tions of methanol. Fuel system damage or vehicle
performance problems resulting from the use of
such fuels or additives is not the responsibility of
the manufacturer.
NOTE: Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
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CAUTION! (Continued)