How Often Should an External Fuel Filter Be Replaced?

1 Answers
LeIan
07/29/25 11:06am
External fuel filters are generally recommended to be replaced every 20,000 to 30,000 kilometers. Fuel Filter: The primary function of a fuel filter is to remove impurities from gasoline, thereby preventing clogging of the fuel injectors. Currently, fuel filters in vehicles are categorized into two main types: internal and external. Due to differences in installation methods, their replacement intervals vary. External Fuel Filter: For external fuel filters, it is typically advised to replace them every 20,000 to 30,000 kilometers. After approximately 10,000 kilometers of use, the gasoline filtered through the fuel filter does not show significant contamination. However, after 20,000 kilometers, the gasoline passing through the filter often appears black, resembling ink. These black substances are actually impurities from the gasoline, which detach when the fuel filter is shaken vigorously.
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