Maintains and regenerates rubber and plastic seals in the engine oil circuit of gas and diesel engines. Oil consumption due to aged and hardened valve stem seals is reduced. No more blue exhaust smoke, improved emissions. External leaks are minimized or even eliminated. Dampens engine noise and reduces repair costs. Reduces pollution and improves the environment. Use in 4-stroke gas and diesel engines, with or without turbochargers. Miscible with most commercially available motor oils. Safe for use with catalytic converters and particulate filters (GPF / DPF). Not suitable for the use with wet clutches! Contents (300 mL) is sufficient for 3-5 Liters (0.7 gal. to 1.1 gal.) motor oil. The product can be added at any time, sealing first takes effect after about 600-800 km (400-500 miles).