Unfortunately, in my case, it didn't work. I have done over 1000 km and the noise remains. Fiat GP 1.4 95

In an old Seat Ibiza 1.2 car from 1991, the suspension was making noise. Sometimes the noise would stop. I installed this product and so far (about 6 months) nothing has been heard.

The sound of the engine has changed for the better/softer, however the oil overall seems to need a change earlier, already at 8,000 km after the previous change and 8 months later it appears darker than what Motul 4100 had accustomed me to in the last 3 years with annual changes at ~10-15,000 kilometers.

Bought it to try and solve the noise issue in the valve lifters of my MB W168... it did the job after a few kilometers of operation... the noise was reduced by 90%...

I made frequent short trips last winter and after a few kilometers, the car made a noise, the engine was "tak tak tak" at idle and when I increased the revs, it became louder and louder... I went to 2 workshops and both told me it was a stuck valve stem... I used this excellent product and after 500 kilometers, it really worked its magic and all the noises in the engine stopped!! From me, 5 out of 5!!

UPDATE: After almost 2 years, the valve stems were never heard again!

For optimal results, after an oil change, I applied it preventively at 40,000 km on a diesel vehicle, it stops the "rattling" of the valves and cleans the hydraulic tappets.

It has a fairly satisfactory result in rattling but it needs frequent use, every other change at most. Relatively expensive.