My new WRX has almost 1500 miles on it now, and I figured this weekend would be a good time to dump the factory fill. I've been agonizing a bit over oil choices, but based on what I've read about Subaru's bypass valve specs was pretty set on using an OEM oil filter. Went by the dealership this morning to pick one up and found out that Subaru's new house branded synthetic oil was actually a reasonable price (not an "on sale" price but about equal to the normal retail price for any decent synthetic around here), not what I expected. I ended up just getting 5 quarts of that for the first change. I'll probably run it 5k miles or so, I guess. I'm a little torn because everyone seems to love Rotella 5w-40 in these engines, but the 2011 owners manual just calls for 5w-30. I'm not sure what's "best" yet but I'm a little uneasy about deviating too much while under warranty. The only mention of 5w-40 in the manual is in a little blurb that basically says you can top off with 5w-30 or 5w-40 conventional in a pinch, but should change to 5w-30 syn at the next oil change. I figured the Subaru branded stuff is an easy default choice. Hopefully I can rest easy with it for a while!