Using this Mishimoto oil cooler kit is easy. First, make sure your engine is cool. Then, install the kit following the included instructions. It's designed to be a direct fit for your 03 - 09 Nissan 350Z or 03 - 07 Infiniti G35 Coupe. When you start your car, the oil cooler will start working to keep the engine oil at a proper temperature. For the version with the thermostatic sandwich plate, it'll help manage the warm - up process for daily driving. As for maintenance, regularly check the oil cooler for any signs of leaks or damage. Keep the cooler clean to ensure good performance. If you notice any issues, contact the manufacturer for further assistance.