I have a 1.9 TDI engine and it seams to leak a bit of oil when its parking facing downhill, I parked it on my girlfriends driveway which I suppose is about a 20 degree slope and overnight an oil patch about the size of a doughnut was left. I parked near my house last night on a very gentle downward slope and there was an oil patch left but a lot smaller. Anyone else had this problem? WHat should I look for to rectify it? Any help on this would be very much appreciated.