The AirDog Replacement Fuel Filter FF100-10 is a direct replacement Fuel Filter for your AirDog Fuel System. The life expectancy for the AirDog Fuel Filter could be up to 25K miles or a year. However, those figures can change drastically depending on fuel quality. Order a few extra and keep them in your cab or toolbox. The 10-micron filter is ideal for use in cold climates.