I am getting 240 w/ 20 miles round trip to and from town + driving in town. Actually when i got it i was lucky to get 200, usually around 180-190. I ended up putting in new o2's (stock ones had 90k on them plus there was a code), a new fuel filter (also stock) and ran 2 cans of fuel injector cleaned (chevron concentrated stuff). Oh also shortly after getting her i seafoamed it but didnt see any difference in mileage. The fuel injector cleaner was chevron techron concentrate plus (black bottle). there is a nonconcetrated too so watch which one you pick up. I was told by quite a few people it works better then other cleaners. I ran two bottles in back to back tanks to clean it out as much as possible. Those are just a few things to think about doing if your mileage isnt too great now. Well unless you are getting crappy mileage cuz you have a supercharged 347 and ya cant keep your foot out of it lol then the best thing to do is regulate the right foot a bit :thumb: