In my 14 35i w/ JB4 and catless DP I get 20-26, depending on what I'm doing. I actually got slightly better MPG after installing the DP since I don't floor it during acceleration. Long trips I get 23-27; DD for work is highway with a little city, so 21-23. Strictly city can be 18-21 depending on traffic, but I don't sit in much traffic ever.
Of course this car is no longer my DD, so it will see almost only highway. I'll post up my new DD/work soon
