Hello, After 12500 km of mileage and km-stand 22800 I had two-year oil change at a free workshop – BWM Diesel 2.0 E84 with Castrol edge 5W30 C3 04 (LL). After approx. 100 km the oil on the oil measuring rod was already abundantly black, on the oil filter and the drain screw were also no traces -clean worked ! The question is, how black can the new oil be already after a short time ? In addition two pictures. The next time I change oil, I’ll check the course myself. If the piston sealing rings let too much through, it wouldn’t go well for long. The OBD probably doesn’t register if there’s too much “steam” in the exhaust gas recirculation. Even if one is psychopatic, it doesn’t rule out that they’re after his car (or money). Maybe everything is good, though.