I have a 2010 Legacy 2.5i with 137,000 miles on it. For last couple of years, I noticed that i would get my old changed and the regular oil would get low about 1000 miles or so short of when my next oil change was due so i'd need auto ad a quart. I thought that it could be that valvoline was not giving me enough oil. I switched to Jiffy Lube and the same thing was happening. I suppose it's possible that all these places put the bare minimum oil in it and shame on me for not making them show me the dip stick every time they change it.
There is no noticeable oil leak.
Last time I went to a synthetic because I thought that might be it. It seemed like the synthetic ran out even sooner than the standard.
Has anyone else experience this? Any fixes? Is it just common practice that you need more oil in these things once they get higher miles on them? Any Additives to help? Open to your thoughts on this...
...and while i'm at it, do any of you all put seafoam in your oil to clean things? I'm sure that doesn't impact my issue but I've come across folks doing this to help performance and thought I'd throw that out while I'm at it!