Nozzle for clean diesel vehicles are designed. 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, etc. internal stubborn dirt, coke and oxidized sediments, eliminating engine idle speed instability, tremor and difficulty in starting, can enhance horsepower and save fuel and reduce emissions, lower maintenance costs, extend engine life.