There is no Power Steering Filter on a 2002 Subaru Legacy/Outback.
The Subaru Outback fuel filter is located inside of the fuel tank. Changing the fuel filter can be very costly and time-consuming.
where would you find out if the Air Conditioner filter is blocked on a 2005 Subaru Outback
I found no mention of a power steering filter in the owner's manual or in the service manual for Outback.
http://www.cars101.com/subaru/airfiltration.html#00-04legacy
The fuel filter is inside the gas tank, attached to the fuel pump.
10 minutes or less
Post a classified add in the local newspaper...
4.5q with a full drain and oil filter change
It's on the right front side of the engine and accessible from under the car.
Bottom of the engine near the front. It points straight down.
Change it every 5,000 miles and you will be fine.