4.2 quarts
134A
Take the distance traveled (X) and divide by the mpg (30)
The owners manual states 4.2 quarts. I use 4.5 to keep things easy.
Take them out then put the new ones in
75d23l (12 v - 52 ah).....
10 minutes or less
take out the old one and put in a new one.
Unleaded; minimum 87 octane for normally aspirated engine
Take the old one off, and install the new one. Dick.
The 2000 Subaru Outback has various wiper sizes based off of trim (sport is different than other trims). See sources and related links below for the wiper blade sizes by vehicle trim.
2 hours with a coffee break. 45 minutes if ambitious.
How much an outback coupon will take off your bill depends on how much the coupon is worth. A good place to find these coupons is http://printable-coupons.blogspot.com/2011/06/outback-steakhouse-coupons.html