K&N Filter is not your ordinary air filter that needs to be replaced every once in a while. The drop-in replacement air filters from K & N air filter can be easily cleaned rather than replaced. The best part about K&N re-useable air filter is that it not only saves money but also reduces your waste impact on the environment due to lesser landfill waste. The quality of air filters also needs to be mentioned as they are less prone to air restriction as they get dirty. Restricted airflow causes a reduction in engine power and fuel economy but it is a problem of the past with K & N filters. Secret behind K & N Air Filters The ordinary air filters consist of paper in their filter medium. This means your car needs to be checked or changed when the filter is dirty unlike K & N air filters.K&N Lasts a Life TimeK&N filters use an oiled cotton filter medium. So right from the instance of fitting them into your car K&N filters allow only clean and free airflow. Dirt is absorbed without getting restricted unlike the paper air filters. No need to worry if your K & N filter gets dirty; you need not throw it away. Just clean it and re-oil it. K&N air filter cleaning interval is longer for less dusty areas and lasts longer than ordinary air filters. You can also ask for a K&N air filter cleaning kit which is good for 5 to 10 uses. K&N air filter invariably will last the lifetime of the vehicle, and their filters are covered with a 10 year warranty.Environmental Friendly Paper air filters cannot be recycled and there is not much you can do about them apart from throwing the whole thing away. However K&N filter lasts the life of the car, and the cleaning kit uses cardboard packaging and plastic bottles which can be recycled.Saves Money You will inevitably end up saving money with K & N air filter. K&N filter though with a starting price of double the reflector telescope collimation ordinary paper filters end saving money due to onetime investment. K&N filter and a cleaning kit will pay for itself after two changes, or about two years. For people who have their cars serviced by the dealership, installing a K&N can pay for itself in a single change.Saves Fuel as wellIf the filter is usually clogged with dirt you end up spending more money on fuel. However K&N air filters have longer service interval and you need not worry about less fuel efficiency and frequent changes as well. After all the main reason we all need an air filter is for engine protection and not just for combustion. K&N air filters are rigorously tested to meet OEM filtration standards.In the long run car users have also praised K&N air filters not only because of the increased airflow and power boost it delivers but also the potential for better long-term fuel economy.