User Manual - Page 244

For 2017 FIAT 500.

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posted octane number of 87 as specified by the (R+M)/2
method. For optimum performance and fuel economy
the use of “Premium” 91 octane gasoline or higher is
recommended.
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 im-
mediately. 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.
Reformulated Gasoline
Many areas of the country require the use of cleaner
burning gasoline referred to as “Reformulated Gaso-
line”. Reformulated gasoline contains oxygenates and
are specifically blended to reduce vehicle emissions and
improve air quality.
The use of reformulated gasoline is recommended.
Properly blended reformulated gasoline will provide
improved performance and durability of engine and
fuel system components.
Gasoline/Oxygenate Blends
Some fuel suppliers blend unleaded gasoline with
oxygenates such as ethanol.
CAUTION!
DO NOT use gasoline containing methanol or gaso-
line containing more than 15% ethanol (E-15). Use
of these blends may result in starting and drivabil-
ity problems, damage critical fuel system compo-
nents, cause emissions to exceed the applicable
standard, and/or cause the “Malfunction Indicator
Light” to illuminate. Please observe pump labels as
they should clearly communicate if a fuel contains
greater than 15% ethanol (E-15).
Problems that result from using gasoline containing
more than 15% ethanol (E-15) or gasoline containing
methanol are not the responsibility of the manufacturer
and may void or not be covered under New Vehicle
Limited Warranty.
242 STARTING AND OPERATING
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