ASE Auto Maintenance and Light Repair Certification (G1) Practice Test

Changing the air filter every 5,000 to 15,000 miles is generally recommended based on typical driving conditions and vehicle manufacturer guidelines. The air filter plays a crucial role in ensuring clean airflow to the engine, which is vital for optimal performance and efficiency. Over time, the filter accumulates dirt, debris, and contaminants, which can restrict airflow and lead to decreased engine performance, reduced fuel efficiency, and potential engine damage.

Regularly replacing the air filter within this mileage range helps maintain the engine's health and ensures that it runs smoothly. The specific interval may vary based on factors like driving habits, environment, and manufacturer recommendations, but this range is a sound general guideline.

Other suggested intervals, such as every 1,000 miles, could be unnecessarily frequent and lead to increased maintenance costs without significant benefits. Meanwhile, intervals such as every 30,000 or 100,000 miles could risk performance issues due to prolonged use of a dirty air filter, which can adversely affect engine efficiency and longevity. Hence, maintaining the filter within the 5,000 to 15,000-mile range strikes a balance between cost-effectiveness and engine care.