Our gasoline fuel additive is carefully formulated from polyetheramine and dodecane. Designed specifically to effectively remove carbon deposits inside the engine, restore engine power, help reduce vehicle exhaust emissions, and make driving more environmentally friendly. The usage method is extremely convenient: 1. Add this product to the fuel tank before refueling, and then fill the tank up. 2. Vehicles that have not been cleaned for a long time may have black smoke in the exhaust during the initial cleaning stage. This is the result of a large amount of carbon deposits being removed. After that, it enters the normal cleaning stage, and the black smoke decreases and disappears. It is recommended to clean and maintain it once every 5,000 kilometers or so. It is recommended to use a car that has not been cleaned for a long time twice in a row. Moreover, it can improve the fuel combustion efficiency, save fuel consumption, protect the key components of the engine and extend its service life.