26/01/2026
After-Sales Knowledge Sharing Series (Car Filters Knowledge)
Do you really understand car filters?
Many car owners complain online that despite regularly maintaining their cars, they still experience minor problems and their performance has declined. This is puzzling; they've spent money and effort, so why isn't it working? Actually, this could very well be related to the car filter. Do you really understand car filters? Let me explain.
More expensive filters aren't always better.
Many car owners believe in the "you get what you pay for" mentality when choosing car filters, thinking that more expensive filters are definitely better. But is this really true? Take air filters, for example. There are inexpensive paper filters and more expensive oil filters on the market. While paper filters are cheaper and easier to replace, their filtration efficiency and lifespan are relatively poor. Oil filters, on the other hand, have good filtration efficiency and a long lifespan, but they are more expensive and slightly more troublesome to replace. Therefore, the most expensive air filter isn't necessarily the best fit for your car. The key is to choose based on your car model, driving environment, and usage needs. If you mostly drive in the city, a paper filter might be sufficient; but if you frequently drive in harsh environments and have high performance requirements, an oil filter might be a better choice. It's like buying shoes; the most expensive pair isn't always the best fit. It depends on your walking habits and activity levels. So, don't blindly believe in expensive filters!
Air Filters Don't Need Frequent Replacement
Some car owners are particularly protective of their vehicles, and upon seeing the maintenance manual mention replacing the filter, they want to replace it every short period. But is it really necessary to do it that frequently? Take the cabin air filter, for example; it's generally recommended to replace it every 10,000 kilometers. Its main function is to filter the air inside the cabin and the air circulating between the inside and outside, removing dust, impurities, smoke, pollen, etc., ensuring passenger health and preventing the windshield from fogging up. However, if you don't use your car frequently or drive in relatively good conditions, you can definitely extend the replacement cycle. After all, filters aren't that fragile and don't need to be replaced on a strict schedule. Take the fuel filter, for example. It's responsible for filtering the fuel entering the engine, removing impurities and moisture to ensure the normal operation of the fuel system. Its replacement cycle is generally 30,000-50,000 kilometers, depending on the quality of the gasoline. If you find it's just a little dirty before its replacement cycle, it doesn't necessarily mean it has lost its filtering function. In this case, you can check its filtering effect first. If it's still filtering normally, you can continue to use it for a while and replace it when it's almost time for its next replacement. After all, a dirty filter doesn't mean it's "broken down."
