Subaru XV 2012: Burning excess oil

Our 2012 Subaru XV has been burning excess oil, and every five months or so I have to top the engine up with a litre or so. After contacting Subaru they told us this was the first time they have heard of this problem, yet in a US class action suit Subaru admitted to the problem and have been replacing piston rings in affected models. I'm at a loss, now that the vehicle is out of warranty do I pay for Subaru to replace the oil rings out of my own pocket?