Ducati 999 2003 Manuel D'utilisation Et Entretien page 180

Viscosity
SAE 10W-40
The other viscosity degrees indicated in the table can be
used if the local average temperature is within the limits
specified for that oil viscosity.
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10W
20W
20
30
20W–40 20W–50
15W–40 15W–50
10W–40
10W–30
–10 0 10
40
40 ° C
20 30
81
E