I recently bought a 2007 Saab 9-3 2.0T 6-speed with 106k as a daily driver. It has the high output turbo but has not been modified nor will it be modified. The recommended oil is stated as Saab 0w-30 or Mobil 1 0w-40. The oils I'm considering are Shell Rotella T6 5w-40, German Castrol 0w-30...
