This excessive consumption will lower your equipment's operating efficiency, significantly increase particulate emissions and increase the risk of equipment failure.Most of the dirt that passes through an air filter's media does so during the early part of the new filter's usable life when its filtering efficiency is the lowest. In fact, it is not until after the first 5%-15% of a filter's useful life has passed that the filter begins to develop an important filtering shield, called the 'pre-coat.' The 'pre-coat' is formed as microscopic dirt particles begin to build up on the surface of the filter media producing a light contaminant layer. Once formed, the 'pre-coat' enables the filter to operate at its maximum efficiency, preventing dust and other contaminants from entering the engine. more... See more text