Welcome Red Wolf,
(man, for some reason that sounds really Native American...)
I don't remember, is 5W-30 the recommended oil? Factory fill for all Saab turbos is M1 0W-40, & several Saab owners use the D1 5W-40 instead. Besides having better detergency, I think it has more anti-wear additives, which would be great for a turbo's bearings. I've just switched to M1 0W-40 in my turbo, so I can't give you any first-hand experience. According to Mobil's literature, the M1 15W-50's supposed to be better for turbos than any of their 30 wts, but going from 5W-30 to 15W-50's too big of a mental hurdle for most folks.
As far as I'm aware, the only downsides are having to justify draining it as frequently as M1 (it should last longer, I think), & getting past the non-gasoline-specific rating. Several folks here have convinced me that the slight differences in ash & other diesel-specific compounds won't affect anything on a gasoline engine or exhaust system.
[Edit:] I just discovered several VW 1.8T reports in the Used Oil Analysis section. If you haven't already seen them, you should take a look.
[ February 06, 2003, 06:52 PM: Message edited by: Greg Netzner ]