It seemed to do the job, while similar results are achieved with more expensive products.
The engine appeared very clean before adding the new oil, as if it had been washed.
I will use it again.

The engine now runs smoother. The metal under the oil filter was shiny and had no deposits at all.

Used shortly before changing the oil in an engine that was consuming a lot of oil (700 to 1000ml per 1000 km). It was used because I wanted to change the oil quality from 10w40 Anax to a thinner 5w30 Total and I wanted to minimize the residue from the previous oil. It was combined with an oil change using an anti-friction additive (motorkote) and an oil sealant (from the same company). The engine seems to be working much better, smoother, with reduced fuel consumption for the first 1500 km and so far it has not required any oil. I suppose it is difficult to evaluate the effectiveness of this specific product separately since it was used in combination with other products, but since it all worked and the engine recovered, I believe it has contributed to the positive result.

I do not know if it does what it promises, and I will not find out, but the oils turned out to be much more fluid compared to other times (10W40). I used it because a similar product had never been put in my car, so I decided to try it. The truth is that I put it in and drove on a national road for about 40km at a low speed (80-90km/h), and then I changed the oil.

It is not possible to know if it does a good job or not, but the oils seemed more fluid after using it.