Using the K&N air filter is a breeze. First, open your vehicle's factory air box. Then, take out the old air filter and replace it with the K&N filter. Make sure it fits snugly in place. When it comes to maintenance, these filters are washable and reusable. You can clean them every 50,000 - 100,000 miles depending on your driving conditions. Use a K&N cleaning kit for the best results. After cleaning, let the filter dry completely before oiling it. When oiling, follow the instructions on the oil bottle. Remember to keep the filter away from sharp objects to avoid damage. And always check the filter regularly to ensure it's working properly.