Is poor fuel economy in Changan Karvaan linked to clogged filters?

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Is poor fuel economy in Changan Karvaan linked to clogged filters?

Some drivers notice a sudden in fuel efficiency, especially when filters arent cleaned regularly. Could blocked air filters cause the engine to burn more fuel? Let’s share technical insights.

Zarnish asked on 06 Aug 2025 11:49:33 am

1 Answer

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Car Mechanic Expert - on 06 Aug 2025 11:54:09 am

Yes. A clogged filter reduces oxygen intake, causing the engine to compensate by injecting more fuel, leading to poor mileage. In user reports, a clogged filter can reduce mileage by 10–25%, depending on severity. The engine ECU Electronic Control Unit adjusts fuel based on airflow, and restricted air causes the ECU to run a rich fuel mixture, burning more fuel.