Using this oil filler cap is easy. Just unscrew the old cap and screw on the new Mishimoto red one tightly. When doing this, make sure your hands are clean to avoid getting dirt into the engine. For maintenance, regularly check if the cap is tightly sealed. If you notice any signs of wear or if it doesn't seal well, it might be time to replace it. Also, keep it away from extreme heat and chemicals to ensure its long - lasting performance.