It is not only effective for preventing oil leaks, but also a high performance oil additive. Car dealers have many places to add to new vehicles. The engine forms a fluorine coating and coats the interior of the car as it is new! By adding regularly (once a year) it will prevent oil leakage of your car and extend the life of the engine. Recommended for those who are not only new cars, but also for those who recently feel engine power dropped. By improving the compression pressure in the engine, you can achieve better response and improved fuel economy. ■ Effective Usage ■ Add 1 bottle per approx. 1.0 - 1.2 gal (4 - 5 L) of engine oil. Shake the container thoroughly for 1 minute before use. While turning the engine, slowly pour it from the refueling port and idle for about 10 minutes (please be careful of the oil scattering); If you previously dissolve it in the oil and put it in the oil will cause it to be more effective. After adding, please drive the car for about 30 minutes. The active ingredients will arrive to the leakage area. The film effect lasts approximately 10,000 km (10,000 km), but it is more effective when used with each engine oil change. When used from a new vehicle, it will continue to maintain its performance and will show the effect at about 33.3 - 110.4 miles (160 - 500 km) from the time of the addition. ■ Please note ■ Never use it to prevent leaks in brake fluids, gas tanks, radiators, air conditioners, and washers. Never use this product alone, or add more than the prescribed amount. ·If you cannot see the improvement effect with this product, there may be a fault of mechanical factory, so please consult a car mechanic factory.