The dirt has to go.

The first experience I made with this product with my MB C230Kompressor where good already came out dirt and then ran silky smooth with the new oil.
When I bought a polo 6n for the winter a year ago I reached again for this product. The vehicle was apparently moved only in the city and not made oil change for years. During the subsequent oil changes then came towards me a pretty dirty, muddy broth. Again, I can say that the engine runs much better since.