Which statement is correct regarding air filters and fuel economy?

The statement regarding air filters and fuel economy emphasizes the importance of maintaining clean air filters for optimal engine performance and fuel efficiency. A dirty air filter can restrict airflow into the engine, causing it to work harder to draw in the air needed for the combustion process. This increased engine strain can lead to reduced fuel efficiency, as the engine has to compensate for the lack of optimal airflow.

In contrast, reusing air filters, as mentioned in Counterman B's claim, is generally not advisable. Filters are designed for one-time use for a period before they become too dirty and restrictive. Reusing them can lead to the continuation of poor air quality entering the engine, further exacerbating fuel economy issues.

Understanding this relationship highlights the significance of regular maintenance, including timely replacement of air filters, as a key component in promoting better overall vehicle fuel economy and performance.