Straight from the Oil FAQ
Does my new Subaru come filled with a special "break in" oil? No. All Subaru engines are factory filled with: Nisseki-Mitsubishi M1K 5w-30 with no special additives. Note: the manufacturer changes from time to time, but they always use 5w-30 mineral based (non synthetic) oil. All new Subaru 2011+ turbo engines and 2011+ Foresters are factory filled with SOA 5w-30 synthetic oil made by Idemitsu Lubricants America Corporation.