Yep we went through this
Yep we went through this exact scenario with a brand new 2018 Subaru Forrester (2.5l). Took it to the east coast here in Canada and while touring the oil light came on. We added more oil before the ould change and finally went to dealer who told us bs about synthetic oil on higly efficient engines etc etc and that this was normal. I can also point out an 800 dollar exhaust piece with flex piping in it went after 2 years and the arms broke that whole the hatch open and the windshield cracked. We don't even go offroad. Subaru fixed the hatch and exhaust out of warranty which tells me they know they have issues with that generation vehicle. The windshield we replaced out of pocket because we didn't even think of the warranty. Anyway back to oil, we haven't had to add oil to cars in 30 years before this car. We won't buy another. Too bad though because I kinda like the AWD in the snow.