... metal protective film on the surface of worn parts, so that the wear engines can get repaired ... of carbon deposition, gelatin and sludge and protect parts from corroding;4.Prolong engine life 3 times, and ... engine life, and it’s harmless to any parts.4.Suitable for all kinds of gasoline and diesel ... , emulsified the moisture6.Prevent the tank and tubing from rusting and corroding, jam oil way.7.Harmless ...