Im a major fan of 20w50 Amsoil racing oil. My mechanic in Chicago used it on his race car and when they would break the engine down after a race there was very little damage internally vs other oils. This was on a built duetto for the record!
I use amsoil in every car Ive own and cant say enough good things about it - other than its damn pricey!
My STi has amsoil in it and doenst burn a drop, with mobil 1 it did burn a bit of oil. Amsoil for the win
Jeff