I've had the same problem
I've had the same problem with my 2013 outback. I started seeing high oil consumtion after 20k miles or so. I get the oil changed every 5k miles and they always tell me its low. More recently i ran low on oil after driving about 2000 miles. I'm taking the car in for an oil change at the dealer to start the oil consumption test. The dealer said i have to pay for the oil change. will post updates