What type of oil does a 2015 BMW 320i use?

For the best fuel efficiency and protection all year round in your 2015 BMW 320i, it's best to use Original BMW Engine Oil. You have the option to go with either conventional or synthetic oil, and you should choose from these specific viscosity grades: SAE 0W-40, SAE 0W-30, SAE 5W-40, or SAE 5W-30. Make sure the oil you select meets the BMW Longlife-01 or BMW Longlife-01 FE standards for gasoline engines, and BMW Longlife-04 for diesel engines. If you can't find these oils, you can use an alternative as long as it carries the API SM or higher rating for gas engines, and API CJ-4 for diesel engines. The 320i requires 6.1 quarts of oil, and it's important to check the level at least once a week. If you're using conventional oil, plan to change the oil & filter every 3,000-5,000 miles. For synthetic oil users, aim to change every 7,500 - 10,000 miles.