I have been having this
I have been having this problem since the summer of 2016. Having to add a Qt. of synthetic oil between oil changes. The light never came on at convenient times that I could leave it at home and take my older Forester out on the road. So I had to carry a Qt of oil with me. But when I took it to the dealer, they couldn't do the oil consumption test unless the light was on, or I brought it in before adding oil. Such a nuisance. I was never told of this class action suit. I just happened to go online to check it out now.