Our three-way catalytic converter cleaner is carefully formulated with dimethyl ether and diethyl ether. Designed specifically for removing carbon deposits to restore engine efficiency improve combustion activity enhance overall power and improve fuel economy and vehicle performance. The usage method is extremely convenient: It is recommended to add 1-2 bottles of catalytic cleaner for every 30-60 liters of gasoline or diesel each time you refuel. It is recommended that every 6 refueling sessions constitute one basic usage cycle and continuous use for 12 sessions is the ideal effect cycle which can continuously improve the cleaning effect. After the first addition carbon deposits may fall off causing poor oil flow or slight engine shaking. This is a normal reaction. Generally the first 3 to 5 cans of oil are the process of removing carbon deposits and decomposing colloids. After completing this stage the fuel-saving effect will be more significant. By adhering to regular use it can effectively clean the fuel system and the three-way catalytic converter reduce carbon deposits improve combustion efficiency and protect engine performance in the long term. This product is suitable for both gasoline and diesel vehicles and can be used for both new and old models. And it can effectively purify exhaust gas and reduce harmful emissions making the vehicle cleaner.