Good news everyone! I just got 30 MPG today!! I drove back and forth to PA today to visit my parents and the results came in, 200 miles, 30.3 miles per gallon!
(I also took the car up to 140 mph - it was my first time with the ms3 over ~110, it was scary as hell, but on a wide open highway, it was just too hard to resist) - and before ppl start flaming me for driving that fast, it was a wide open highway and as soon as I saw traffic coming up ahead I dropped it down to ~85 pretty quickly