tri_photoI've heard that Subaru's tend to go thru oil kinda quick, at least pre 2014 models do. But other than that... my brother has had Subarus for years, I just bought one... they perform great
Subaru's love to burn oil. Especially if you downshift a lot or use engine braking on hills. Something about the negative pressure dumps oil into the cylinder. I took my Impreza on a really windy back road once around Sundance in Utah and downshifted a lot going down the hills and I swear it burned almost a quart by the time I get back.
One thing to check on Subarus' is the timing belt replacement. They are supposed to to be done at 100k miles and its an interference engine so it will basically go BOOM if you let the belt snap. Its something to ask on higher mile ones and if it was not done I would incorporate that into your price negotiation.
Also check out the CV axles and make sure the boots look good. Subaru CV axles are really expensive to replace and the cheap ones at AutoZone are not recommended at all. If you know what you are doing you can get a reboot kit for like $80 at the dealer but if you dont know how to do it its something to look into. Im basically a pro at rebuilding them at this point lol.
Also, the rear hub bearings get fried if you do too much E-brake stuff so really listen for any kind of whining in from the back of the car. They are almost impossible to replace yourself too. Its not a huge job for a mechanic but still a few hundred.
Spark plugs are a total pain in the ass on boxer engines so they may be neglected. Not a deal breaker but be prepared to probably throw some new ones in after purchase.
Other than that the cars are pretty solid. I have had my Impreza since 2007 and aside from the normal maintenance (and head gaskets) it has been reliable.