Hi Ian,

    Why not simply do what Volvo advises?

    Not that I suspect there is anything wrong with what you’re doing now, but the official approach has the added bonus of being cheaper and easier, since I now use and carry spares of the same oil for both the engine and SD.

    Volvo’s change to this recommendation happened, as I recall, about 4 years ago…

    s/v Battuta
    Vancouver, Canada