This vehicle is low mileage (27,000)and drinks oil.We disconnected the intake to the turbo and the outlet to the intercooler and it was pumping oil from the outlet pipe.Our diagnosis was turbo passing oil and we have replaced it.All seemed OK untill vehicle does long journey and it uses approx 1.5 litrss of oil to one hundred miles.We have changed the inlet manifold gaskets on the engine which run in the crankcase but still a problem.Do these vehicles suffer with ring wear or rings sticking up in pistons? Causing excessive back pressure and not letting the Turbo drain. Any help would be appreciated thanks.