Using this Perrin oil filler cap is easy. First, make sure your car's engine is cool. Then, simply remove the old oil filler cap and replace it with this new one. It should fit snugly. As for maintenance, you don't need to do much. Just keep it clean with a soft cloth and mild cleaner. Avoid using abrasive materials as they might scratch the anodized finish. When installing, follow the included instructions carefully. If you have any questions, don't hesitate to reach out to customer service.