What is your experience with 850 2.5 TDI engine oil capacity? The manual says: -5.5 liters (without oil filter) -6.0 liters (including oil filter) I have done it 6 times with my 1996. estate, since I bought it, and it always swallows almost 7.0 liters incl. oil filter (I always change the filter). Did it yesterday, and can't live with the mistery anymore :-) THNX.