I must be doing something wrong, I am getting 27.
Only had the car for 2 weeks but the first two tanks averaged 27. First tank was driving it home from PA where I found it very easily cruises at 110.

I have owned 6 Porsches but have become a devoted owner of the Xfire. If they made the SRT-6 in a manual would have loved to have one of those.

LOVE MY XFIRE.