When the filter element in the fuel filter has been seriously polluted by harmful substances, the color will turn black, so it must not be replaced. Otherwise, the fuel filter element will not have a good filtering effect, which cannot guarantee the cleanliness of the fuel when it enters the engine cylinder and burns. Not only will the power of the car be severely reduced, but it will even affect the service life of the car's fuel pump.

The hazards of not changing the gasoline filter are:
1. The gasoline filter is like a mask worn by a person. If the air filter cannot effectively filter the suspended particles in the air, the lighter ones will accelerate the wear of the cylinders, pistons and piston rings, and the heavy ones will cause the cylinders to strain and shorten the service life of the engine;
2. If the gasoline filter element is too dirty or clogged, it will cause difficulty for the car owner to start the car, sometimes it takes 25 times to hit the car. The terrible thing is that the engine stalls while driving. For example, the brakes will fail and the steering will lose control in the corners of the mountain roads. Under normal circumstances, the cars need to be replaced regularly, especially the cars with fake and inferior fuel. If there is too little gasoline, the oil pump will be burnt only if the cooling is poor;
3. Too much water in the cup will change the oiler along with gasoline, which will affect the combustion of the fuel;
4. The sealing gasket is damaged and oil leaks; the casing of the gasoline filter is broken and the oil leaks; the oil pipe joints are loose and seep or leak, which makes the gasoline supply unsmooth; the oil pipe ruptures or breaks, etc.