Ducati XDIAVEL Owner's Manual page 316

Recommendations concerning oil
It is recommended to use oil complying with the
following specifications:
- viscosity grade SAE 15W-50;
- standard API: SM;
- standard JASO: MA2.
SAE 15W-50 is an alphanumerical code identifying oil
class based on viscosity: two figures with a W
("winter") in-between; the first figure indicates oil
viscosity at low temperature; the second figure
indicates its viscosity at high temperature. API
(American standard) and JASO (Japanese standard)
standards specify oil characteristics.
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