Don't trust the calculated MPG on the dash and don't get too worried until you've hand-calculated several tanks and it's consistently low.
I guess I'll be doing some manual calculations for my next few tanks, I won't be jumping to any conclusions yet but it's discouraging seeing those low numbers. I bought this car for its mpg and sportiness, loving the sportiness so far, but will continue to pursue those MPGsI've only put just over 1000 miles on my car. First tank was 34.5 mpg, second tank was 36 mpg, third tank was 36.8 mpg. These were all hand calculated. My typical drive to work is 2 miles city then 8 miles of 55 mph, then 14 miles at 70 mph, 3 miles of 65 mph, 2 miles city. If I had all 55 mph highway I think I could get 40+mpg.