Good day. I decided to leave a review a week after using this additive. So! I recently changed the oil in my car, I bought the oil on the advice of a friend, the oil turned out to be not very good quality. In order not to drain it, I decided to add an additive. I thought for a long time about choosing an additive and decided to stop at this one. After all, its price is almost the same as 4 liters of oil. I have a Touareg 2004 3.2 l mileage over 300 thousand. In general, after using the additive, the noise in the engine disappeared, the gas became more sensitive. It feels like I installed a new engine. I think I'll drive about five thousand and then change the oil. In general, time will tell the effect of this miracle additive, but so far everything suits me. Who is thinking about taking it or not, my advice is to take it. The changes in engine performance are obvious! I recommend the seller.