Genuine Nissan Motor Oil 0W-20 is recommended and is the factory fill on most models. With today’s engines and technology the proper grade of oil is essential to obtaining maximum performance and customer satisfaction. Failure to use Genuine Nissan Motor Oil 0W-20, where recommended, could result in serious engine damage. Nissan Genuine 0W-20 oil is also approved for use in place of 5W-30 viscosity oil. Therefore, for warranty purposes Nissan Genuine 0W-20 oil is an approved alternative and is recommended to be used.