What type of oil does a 2004 Subaru Outback use?

A 2004 Subaru Outback typically uses 5W-30 motor oil. It's important to choose an oil that meets the API (American Petroleum Institute) certification standards as specified in the owner's manual. Synthetic oil can also be used for better performance and protection, especially in extreme temperatures. Always check the manual for any specific recommendations based on your driving conditions.