Fuel Requirements; 1.4L Turbo Engine - Fiat 500 X 2016 Owner's Manual

342 STARTING AND OPERATING
NOTE: Changes or modifications not expressly approved
by the party responsible for compliance could void the
user's authority to operate the equipment.

FUEL REQUIREMENTS

1.4L Turbo Engine

This engine is designed to meet all emis-
sion regulations and provide satisfactory
fuel economy and performance when us-
ing high-quality unleaded regular gaso-
line having an octane rating of 87 using the
(R+M)/2 method. For optimum performance and fuel
economy the use of 91 octane 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 imme-
diately. 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 consid-
ering service for the vehicle.