Hello guys, let me know again! I had my Omega on the WE for the oil change in a free workshop. Now the chief mechanic there instead of 5W40 (as it was before) filled in 10W40. I forgot to say and he looked in the specification for Omega. Actually he could also have looked into the service booklet, but that’s another topic…. Question is, what do in now with the 10W40 in the engine. Should I let it in, tear down my 7500km and afterwards again the 5W40? Or would you throw out the 10W40 and change it immediately? Annoying thing like that (if you don’t do everything yourself!). Thank you for your answers, greeting Markus