I also used to get around the 220 miles to reserve, then fitted a DNA filter and Kev mod set @4 o clock. The troubler is that I can now get power from 2500rpm and the torque seems to be more apparent. I have an MTC single can as well and the sound on hard acceleration is possitively addictive, hence I now only get late 190's to 200 to the gallon but the smile is bigger!
Problem now is that I can rip up a TKC in about 2500 miles
Your call!