Thanks, AJ: That makes sense now, and I, too, would prefer to stick with one brand of oil.
Big Dave: Glad to hear you're loving the R32 as much as I am. I suggested the 1500 mile oil change here, but was strongly discouraged away from it--not that it would cause damage, but perhaps that it was just unnecessary. I know the M1 0w-40 meets the specs, and I'm a big fan of Mobil 1, but I'd just feel a lot better running a thicker oil in the VR6 engine. I'd like to go with a 5w-40, so I'm still bouncing around between Amsoil or GC (which meet the specs, but are hard to find) or M1 T&SV (which does not officially meet the specs, but is a great oil anyway and is easy to find) or M1 0w-40 (which, well, see above).
Have you changed out you tranny fluid? I'm thinking I'll switch to Redline.
Finally, I almost bought a 95 M3 (GREAT year for that great car). The guy wanted to sell it to me, but I couldn't offer him enough for him to pay off his loan. Instead, I bought a 2000 M Coupe and drove it for a while.