It is better to change between 8,000 and 10,000 kilometers. If there are water and impurities in the diesel, the parts of the fuel system will corrode and rust due to the water in the diesel. Removing water from the diesel is very important for trouble-free operation of the fuel system and prolonged service life. The fuel water separator plays this role.

The role of fuel water separator:
1. The fuel water separator is a separator that uses the principle of gravity sedimentation to remove impurities and water based on the density difference between water and fuel. There are also separation elements such as diffusion cones and filter screens inside;
2. The fuel water separator also has other functions, such as preheating the fuel to prevent waxing, filtering impurities, etc., separating the fuel from water and separating the water in the oil, which has a certain effect on improving the engine oil burning;
3. It is a kind of fuel filter, and its main function is to remove the moisture in the diesel, so as to reduce the failure of the fuel injection nozzle and prolong the service life of the engine.