After charging the additive and 300 km driven, the clacking of Hydros is finally gone ... For me a Hydro began after an oil change, where we had foolishly changed the viscosity of the oil, brutally loud clacking (tickers) - an absolutely maddening noise. Has sounded like an old Beetle or almost as diesel knock. After I 8,25 l oil content, just two bottles were introduced. Result was first zero, now around 300 km of Hydro's obvious by cleaned and the noise is completely gone. The ticker was with me already constant because, not only with the engine cold, as it is usually. Can I Really recommend. Price at Amazon is more than ok, I bought at Forstinger (Ö) to 13.99 per bottle !!! But was it worth it to me because I wanted to try it right.
