I run Mobil 1, you'll find Mobil 1 5w30 contested a bit here, some say it can lead to spun rod bearings. And never, ever, ever attempt to go 10k miles not matter what you run.What kind of oil should I run? I was thinking Mobil 1. If I do synthetic, can I go 10k miles like most cars can on synthetic?
Unless you're modded enough to make it a requirement, stock ignition components are always best.What kind of spark plugs should I buy?
Load up your year/mileage at the website and see what the maintenance menu says. If they have a "severe use" schedule, choose that option. Others that have owned a Subaru longer than I have can give you some other things to check out at that mileage.