jtbo!
Another thing that came up in my mind. One of the reason for not using more liquid oil than 10W40 that my D6 likes drinking motor oil instead of diesel:/
When I used 15W40 the oil consumption was about 0,7L/1000km and 1,1L beside the 10W40. My car mechanic said that it's not a surprising thing although it was renewed, because this type of engines tends to consume oil.
What was your experience? Was your Volvo thirsty for oil??
Hmm, Citroen. I had a CX several years ago, I loved it, the shape of it, and and the unique solutions of it.
Best wishes and excellent consumption improvement for All!!!