Ducati DESERTX Owner's Manual page 101

Fuel label
The label identifies the fuel recommended for this
vehicle.
1) The E5 reference inside the label indicates the
use of fuel with a maximum oxygen content of
2.7% by weight and a maximum ethanol content
of 5% by volume, according to EN 228.
2) The E10 reference inside the label indicates the
use of fuel with a maximum oxygen content of
3.7% by weight and a maximum ethanol content
of 10% by volume, according to EN 228.
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Fig 59