The engine light turned on after refueling with gasoline. I added a 100 octane gasoline and this additive, the indicator went off and it hasn't turned on again. It probably did something.

As I mentioned in another review, it is difficult to draw conclusions easily with just one use, whether it did the job or not.

As a brand and in terms of product quality, Liqui Moly is well-known in the automotive industry.

With just one use of this particular product, I cannot easily express an opinion.

Perhaps someone will notice a difference if they use this liquid more frequently, and not just after a few thousand kilometers as stated on the packaging.

For example, if someone takes a trip from Athens to Thessaloniki, they should use one container on the way there and immediately after, use it again on the return journey.

Perhaps this way, there will be a clearer picture with frequent use.

It was giving me a problem with the catalyst, so I decided to try the product. I added it to a full tank with the engine running, burned all the gasoline, and the error went away. So far, I have driven about 300 kilometers without the light coming back on, which would normally happen at 50 to 60 km... I will wait to drive more kilometers to see if it comes back on, and I will add an update here to give it a five-star rating. Edit... After 600 km, the light came back on again

I had no indication in the car. Gas measurements were normal. However, it constantly smelled like gas in the car for months. I filled the car with a 100 euro bill, put one of these in the tank, and after several kilometers, it never smelled again. Well done, honestly.

P.S. There is also a version that you spray into the intake, but I wouldn't risk it.

Very good product for those who want to clean the exhaust system. My car was showing a warning light with code P0420 indicating a problem with the sensor or catalytic converter, but after using this product, the light never came on again. It is also good to put it in the fuel tank.