I agree with what most of the others have said. GC 0W-30, Mobil 1 0W-40, or Rotella T Synthetic 5w40. I'd try the RTS first, do a used oil analysis on the first and second used oil analysis, and see how it goes. I know the WRX STI's absolutely love it, and they have a 'little' more power running through them than a Mini Cooper S.