I have been toying with the idea of having this car has a "fun" car and I have decided to go over the top nutty with it. I am having it tuned (with Cobb) as well as modifying it a bit with intake, exhaust, light weight pulley, and new inter-cooler. As such, warranty is no longer a concern. So oil choice has expanded! I plan on running either Redline or Motul 5w40 in it. However, I was able to pick a few cans of this "stuff", and I think it will come in handy while dyno tuning this beast over the summer: I also plan on changing out the diff's and tranny fluid to either Redline or Motul. (still researching and pondering what to go with long term) The performance shop that I have been speaking with has a lot of experience with Subaru and they all drive WRX's and STi's. From doing my own research and from speaking with them, I am looking at breaking 325+ horsepower. I am going to need to begin converting the fuel pump/injectors and internal parts such as pistons beyond that to keep up. . . For those wondering, I am planning on buying a low mileage, early 2000's Audi A4 for a "daily driver".