How often should air filters be replaced in DTNA engines?

The correct choice states that air filters in DTNA engines should be replaced every 15,000 to 30,000 miles. This range is typically recommended based on maintaining optimal engine performance and ensuring that the engine air intake remains efficient and free from contaminants.

Regular replacement of air filters is essential because clean air entering the engine is vital for combustion efficiency and overall engine longevity. If the filters become clogged, it can lead to reduced engine performance, increased fuel consumption, and higher emissions. The specified interval ensures that the filters can effectively capture dust, dirt, and other particulates before they enter the engine, supporting its health and reliability over time.

While other intervals may be suggested in different contexts or for specific environments, the 15,000 to 30,000-mile range reflects a balanced approach for standard driving conditions, helping to avoid potential performance issues associated with neglected maintenance.