Here is one on the 3.6- http://www.subaruoutback.org/forums...d-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
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