I run Rotella, but I don't drive my car in the winter. With my new motor I'll be running next season, I'm really not sure what oil I'll be running. I'm sure some people will say I should run Synthetic, but meh, I'll probably keep running Rotella. I noticed Rotella sells just a 10w-30 in the jugs too. I never knew that before. I might switch to that now instead of the 15W-40.
And about the tranny fluid...
http://www.dsmstyle.com/forums/showthread.php?t=12721