I have an 06 too and that's about what I get around town... I got up to 144 on a steady motorway cruise... not blatting it just a steady 75 mph ish... Then I've been late meeting up with the Brit guys, blatted it, and got to 115 and run out. Gone on reserve should I say.
A lot is riding style, the easier you are on acceleration, the less gas used...
Gina
03 America - Pretty stock - except the TBS wheel...

06 America - missing, presumed in bits. With it's TBS wheel...

09 America - It's very blue....