I just bought a 04 Saab 9-5 Wagon with 75k and not much service history. Most the guys on the Saab forums and dealers use engine flush every change and Mobil One 0w30. I have not been able3 to find a flush compatible with Turbo engines local. The oil was pretty dirty (dino w/ 3k and 7 mo. )so I didn't want to use flush in it. So I went to local NAPA and low and behold they just started carrying a end cap of Lubro Moly Products. I grabbed a $7.00 Can of Lubro Moly Pro-Line Engine Flush. I heard a guy say that O'Reily's had Gallon Castrol GTX for $10. So a quick oil change with the GTX, New cheap filter and LM, idled 10 minutes then a fresh 5w30 Valvoline Syn Power and a WIX filter. I was shocked at how dirty the clean GTX was. It looked worse than my normal waste oil. I'm glad I gave this flush a good medium to remove carbon. Might have been overkill but my peace of mind is worth the $13.00 bucks.
Lubro Moly
Lubro Moly