What Happens If You Don't Change the Car Filter?

2 Answers
Julian
08/31/25 3:37am
Not changing the car filter can easily lead to unclean oil, increased mechanical impurities, insufficient fuel supply to the engine, decreased engine power, and symptoms like weak driving performance. If not replaced for a long time, it can cause an increase in mechanical impurities inside the car, insufficient local lubrication, and reduced oil pressure. Replacing with a clean car filter can improve engine efficiency by more than 10%. The car filter is a device that filters out impurities or gases. Common car filters include: air filters, cabin air filters, oil filters, and fuel filters. Each type of filter targets different impurities, but they all essentially filter out impurities in air or liquids.
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SanLeilani
09/12/25 7:02am
From the perspective of someone with extensive driving experience, not changing the filter will definitely cause trouble. Let's mainly talk about the air filter. If it's not replaced for a long time, it gets clogged with dust and debris, restricting airflow. When the engine doesn't get enough air, fuel combustion becomes incomplete, leading to a noticeable drop in power. Acceleration becomes sluggish, and even driving on the highway feels strenuous. Fuel consumption can also increase by 10% to 20%, meaning you'll spend more on gas in the long run. More seriously, carbon buildup inside the engine increases, potentially causing overheating or even breakdowns, with repair costs running into thousands. Don't overlook the oil filter and fuel filter either—they're just as important. Not changing the oil filter allows contaminants in the oil to wear down components, and a clogged fuel filter disrupts fuel injection, making the ride less smooth. I learned this the hard way—once, I got lazy, and my car broke down halfway, costing me a fortune in towing and repairs. Now, I stick to regular maintenance to avoid headaches. For safety's sake, check your filters every 10,000 kilometers—don't let small issues ruin your entire car.
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