I own a 2004 9-5. I have used M1 0W40, GC 0W30 and Schaeffers 9000 5W40. No oil analysis, however it runs and sounds the best with GC then Schaeffers.
I use Amsoil oil filters and change the oil every 5,000 miles with the filter, because my driving varies from 2 miles a day to 200 miles a day.