I've already been through
I've already been through this process with my 2014 Forester. The dealer finally replaced the rings after an entire year of issues. It didn't take long once the repairs were done for the same issue to start again. I was told I needed to start the oil consumption process again & "we'll go from there". Subaru now says its "normal" to have to add a quart of oil every 2 - 3 thousand miles. This gets quite expensive especially since the synthetic oil changes are more costly. If this was normal, every vehicle that uses synthetic oil would have the same problem. That doesn't seem to be the case. I never would have purchased this vehicle if I had known about the oil consumption issue.