'05 9-3 Arc getting horrible mpg

[Cyborgitron3000]

So I recently purchased a beautiful '05 9-3 Arc that is in great shape and very clean. I love everything about it, except it is not getting the gas mileage everyone who has a Saab told me I would get and not what Saab claimed it would get either. I am averaging 21-23 combined with the best on the highway being 27 or so running at 70mph the entire time. I drive like someone's grandma... no tearing around, no slamming on the gas or breaks, cruise on the highway at around 70mph, don't have a ton of extra weight in the car, etc etc. When I took the car in to get it checked top to bottom before I purchased it, the local Saab shop said it was in tip top shape and clean. So what gives??? I can't figure out why I'm not getting the mpg everyone else is. I hear 31-35 highway, 26-28 city, and combined 28-33. I get 21-23 combined and 27 highway!!! I'm coming up on my 60k tuneup, and I'm wondering if the previous owner didn't get the 30k tuneup done, or what. Any ideas?

Thanks everyone.

[saabaero01]

Do an injector cleaner to clean your injectors if the guy didnt do the 30 thousand it could clog up the injectors. I have a 9-5 and i average 29ish and ill push it once and a while. Or you can put a filter on it. But watch the octane you put in some call for 93 octane.