1. 2005 Subaru Legacy gt, 52k miles, modded stage 2 turbo
2. manual says 5w-30 GF-3. for a modded turbo the concensus on subaru forums is an OCI of 3750.
3. Minneapolis MN
4. Mostly drive easy 20min freeway to work and back but i do like a spirited drive and hit high boost several times a day...