Classic Saab 9-5 (1997 - 2009)
I saw this thread in the 9-3 forum and thought I'd open it up on the 9-5 forum.
The 9-5 owner's manual says the 2.3T Aero can accept any where from 87-93 AON octane with 93 being the preferred level.
Up until this morning, I was unable to find anything above 92 AON in my local area. Today I...