Ducati 999 Manuel D'utilisation page 159

Remove right fairing (page 55).
Unscrew the filler (3, fig. 54) and add a mixture
consisting of water and antifreeze SHELL Advance
Coolant or Glycoshell (35-40% of the volume) up to MAX
mark.
Refit the filler (3) and reassemble all removed parts. This
mixture improves operating conditions (coolant will start
freezing at –20 °C/-4 °F).
E
Coolant circuit capacity: 2.8 cu dm (liters).
Warning
Place the motorcycle on a flat surface (vertical) and
make sure the engine is cold before proceeding.
60
3
fig. 54