Fuel Requirements; Reformulated Gasoline; Gasoline/Oxygenate Blends - Fiat 2013 500 ABARTH Owner's Manual

266 STARTING AND OPERATING

FUEL REQUIREMENTS

This engine is designed to meet all emission
regulations and provide satisfactory fuel
economy and performance when using
high-quality unleaded "regular" gasoline
having an octane rating of 87. For optimum
performance and fuel economy the use of 91 octane or
higher is recommended.
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.

Reformulated Gasoline

Many areas of the country require the use of cleaner
burning gasoline referred to as "Reformulated Gasoline."
Reformulated gasolines contain oxygenates and are
specifically blended to reduce vehicle emissions and
improve air quality.
The manufacturer supports the use of reformulated gaso-
lines. Properly blended reformulated gasolines will pro-
vide excellent performance and durability of engine and
fuel system components.

Gasoline/Oxygenate Blends

Some fuel suppliers blend unleaded gasoline with oxy-
genates such as 10% Ethanol, MTBE, and ETBE. Oxygen-
ates are required in some areas of the country during the