[EC900]

Specification is 90 weight oil. A 85W-90 is a winter/colder climate formulation. Swepco seems to be the favorite here and like a new engine, In any event the oil you choose for the break-in period will need to be changed out after the recommended break in interval.
Then changed again but at the service life recommendation (30k), though once a year or every 6,000 or so miles is added insurance like engine oil depends too on driving style and conditions.