Mercruiser 1.7 dti - Engine oil - How much/What type?

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Hi all,
Guy who bought my old boat is wondering how much engine oil and what type the Mercruiser 1.7 dti uses?

No smart comments needed, it's not my engine!

[Turbodiesel]

Oil capacity is 6.5 litres.

Requirement
To help obtain optimum engine performance and to provide maximum protection, the engine
requires engine oil with a rating of HD-SAE-API CG-4, CH-4.
Recommended
Mercury MerCruiser strongly recommends the use of:
• Mercury Diesel Engine Oil
This oil is specially blended 15W-40 oil with Marine Additives, for all temperature operation.
It exceeds requirements for API CH-4, CF-4, CG-4 and CF-2 oils.
Other all temperature operation 15W-40 oils approved by Mercury Marine and Marine
Power Europe.
• Shell Myrina
• Texaco Ursa Super TD
• Veedol Turbostar
• Mopar
• Wintershall Multi-Rekord
• Wintershall Viva 1

Thats what the book says!!

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Thanks a lot for that TurboDiesel, much appreciated