+1 on the valve, Works great!Here is one on the 3.6- http://www.subaruoutback.org/forums/99-do-yourself-illustrated-guides/31533-diy-10-11-3-6r-oil-change.html
I think the only differences are 1) location/position of filter and quantity of oil (although you should have someone with a 2.5 review this and confirm). Also, if you are going to do your own oil changes regularly, you may want to consider replacing your drain plug with a fumoto valve. One less tool required, and no need to stock up on those little washer thingies. QuickOilDrainValve.com - the best way to change oil
Pssst… even my dealer says (of which he will plausibly deny under oath) you can use the washers 2x.
And I’m not surprised either, my Accord has the same type and I’ve tried/tested it several times – no leaks till the next dump. Albeit pointless given the washer cost.<O</O