Hi Franz,
I changed (I should say, 'had it changed') at 3,000 with dinosaur oil, then at 6k changed to Mobil1 5/30 synth based on lots of feedback from other Subaru drivers.
here's some seccs discussion on weights:
http://www.seccs.org/forums/viewtopic.php?t=267
when r u coming to a meet again? (We're at the Flowing Tide Pub on S Meadows, that's still your part of town right?).