Saab 99, 90 (1969 - 1984)
I am new to saabscene, though I have had a 99 turbo for a couple of years now - a black 3 door.
In the last few months my 99t has started pinking with full turbo boost. I am generally using super unleaded with the Millers VSP additive, which in theory should give me 99 RON! I recently...