Treat your baby! Royal Purple in the engine/tranny/rad...
For the 6MT d00ds...the SyncroMax works wonders for smoother shifting especially at colder temps.
Here's some links for your reference:
Auto products:
http://www.royalpurple.com/prodsa/auto.html
Motor:
http://www.royalpurple.com/prodsa/rpmoa.html
Tranny:
http://www.royalpurple.com/prodsa/scmax.html
Rad:
http://www.royalpurple.com/prodsa/prpice.html