I had put low-quality gasoline in my Skoda Fabia first generation. I had to put this product in the tank to smooth out the engine a bit, which seemed to be struggling and lacking power due to the bad fuel, even having a rough idle. It did the job to some extent, but not as expected, although it helped me about 60%. Maybe I should have used a more effective and relevant product for my issue. It is a good product, it works immediately and the difference is noticeable, as in my case. It somehow unclogged my engine and brought it back to its usual performance. If needed, I would choose it again.