2013 1.7 cdti ecoflex... After 20 -30 mins driving my engine starts to sound really tinny and no where near as smooth sounding as when you first drive it... Got quite a bit of oil mist leaking from slightly loose air intake to the turbo area.. Top round pipe just right of engine cover... That's all I can see that might be wrong with it.. Any one helo.. Is that the norm or have I got issues.. No not mentally ☺