The 16 and 17 outback I have
The 16 and 17 outback I have (16 is a 6 cylinder, 17 a 4) so far isn’t using oil. If the years before are using more than one quart between changes something is wrong. Keep check of the oil and don’t let the engine burn up, they give you trouble and won’t correct the oil issue trade it in and go with another make/brand of vehicle other than Subaru. That is the best course of action.