Using your K&N air filter is easy. First, open your vehicle's factory air box. Then, take out the old air filter and insert the K&N filter in its place. Make sure it fits snugly. When it comes to maintenance, you can clean the filter every 50,000 - 100,000 miles, depending on your driving conditions. To clean, use K&N's filter cleaning kit. Spray the cleaner on the filter and let it soak for a few minutes. Then, rinse it gently with water. Let it dry completely before applying the K&N filter oil. Make sure to follow the instructions on the oil bottle. Always check the filter periodically for any signs of damage. If you notice any tears or holes, it's time to replace it. Keep in mind that using the K&N filter will enhance your vehicle's performance, but make sure to keep up with regular maintenance for best results.