I agree 11 mpg is way to low.
The worst I have ever had was 16 mpg and that was with foot to the floor revs high for most of a tank. I like Kewl get about 19 to 22 mpg. This car is amazing and just ask sikredrx-8, most people have no idea of what it can really do. It still turns heads and police show it respect by not pulling you over for going 5+ over the speed limit.
Unfortunately, I got stuck in traffic and could not witness the drafting.