Its purpose is to protect the engine; it should not allow the access of contaminants like dust, moisture, bacteria, etc. into the incoming airflow. Therefore, it is of vital importance to keep it in good shape. It is important to consider the following information:
According to studies of large manufacturers, most of the problems of wear and tear on the engine are caused by particles that have entered through the airflow.
A dirty or obstructed air filter prevents an even air flow, necessary for the proper operation of the engine, which can actually increase fuel consumption.
Once the dust enters the filter, it cannot come out; it is NOT recommended to blow the filters, in doing it so, you could break the fibers allowing more dust and dirt into it.
Except for special circumstances, it is recommended to replace it every 10,000 miles. Taking care of the filter is simple, and can be a money saver, not only in fuel consumption but also by preventing expensive engine damage.
Article written by Danny Martínez