How Many Kilometers Should a Car's Fuel Filter Be Replaced?

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Generally, it is recommended to replace the fuel filter every 20,000 kilometers, but this depends on the road conditions and fuel quality. Below is a detailed introduction to the car's fuel filter: 1. The function of the fuel filter is to remove water and impurities from the gasoline. 2. When the engine is running, fuel is drawn by the fuel pump through the inlet pipe into the sediment bowl of the filter. As the volume increases and the flow rate decreases, heavier water and impurity particles settle at the bottom of the bowl, while lighter impurities flow with the fuel towards the filter element. Clean fuel then permeates through the fine pores of the filter element into its interior and flows out through the fuel pipe. 3. If the fuel filter is too dirty or clogged, the main symptoms include: slow or no response when accelerating, difficulty starting the car, and sometimes requiring 2-5 attempts to start the engine. In such cases, the fuel filter should be replaced.