Our car three-way catalytic converter cleaner is carefully formulated with polyetheramine and dodecane. It is specifically designed 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 completely. 2. For vehicles that haven't been cleaned for a long time, there may be black smoke in the exhaust at the beginning of the cleaning process. This is the result of a large amount of carbon deposits being washed away. After entering the normal cleaning stage, the black smoke will decrease and disappear. 3. We recommend cleaning and maintaining once every 5000 kilometers. For vehicles that haven't been cleaned for a long time, we recommend using this product twice consecutively. 4. Do not clean in the following situations: The three-way catalytic converter has been burned due to high temperature or lead poisoning. The three-way catalytic converter is severely clogged, and the engine has oil leakage. Only after treatment can it be used. Moreover, it can improve fuel combustion efficiency, save fuel consumption, protect key engine components, and extend the service life.