Hello, everyone. Fuel efficiency

[Netas369]

Hi, I have a powerboat Sessa C35 (2007 year) twin d4-260 diesel volvo penta engines, Im gonna put it on water on next spring in Germany and Im planning to travel it to Malta, Valleta. But the question which really frustrates me is how much fuel it will consume, as it a lot of nautical miles, I really do help from someone to calculate it . So if someone would be able to help I would be reaally happy !

[Netas369]

That should help
https://www.powerandmotoryacht.com/boat-tests/sessa-c35