1. Provide the best lubrication protection from injector to combustion chamber;

2. Improve the stability of gasoline components to reduce volatilization;

3. Inhibit and eliminate the generation of attachments in the injector and the combustion chamber;

4. Effectively reduce the emission of harmful gases of the engine to protect environment;

5. Improve the gasoline combustibility to save fuel oil.

Before refueling, the gasoline protective agent C991 is added to the fuel tank at the proportion of 0.08%-0.1%, equivalent to 8-10ml C991 added to every 10L fuel. 60mL gasoline protective agent is required for 60-80L fuel.