An additive lineup of LIQUMOLY brand recognized and cultivated in Germany, advanced industrial countries. Effective on European cars such as German cars, as well as Japanese cars. Reduces hydraulic tappet noise and optimizes hydraulic lifter operation Can be used on gasoline and diesel vehicles and added to engine oil. Can be used with both mineral and synthetic engine oils. ■How to use: Turn the engine off and remove the oil cap when the engine is cool enough, and pour this product from the oil inlet hole. Please idle for about enough minutes after injection. ■Effect: Purifies valves and bores; Reduces noise in hydraulic tappets; Caution: Turn off the engine and remove the oil cap when the engine is cool enough, and pour this product from the oil inlet hole. Please idle for about enough minutes after injection.