For clean gasoline engine injection system. Unique EEHIL polar aprotic specially formulated, super clean power, can rapidly break down, and remove and wash away the gasoline engine injection system, fuel oil, diesel fuel injectors and other internal stubborn dirt, coke and oxide deposition materials, eliminating engine idle speed instability, tremor and difficulty in starting, can enhance horsepower and save fuel and reduce emissions, lower maintenance costs, extend engine service life.