Ed, I can't ever figure how my bike is running great, plugs look great, and I get about 10 mpg less than you. I know my speedo/odometer is off. I figured it shows 2-3% less miles than I actually go. To make up the difference, though, yours would have to read more miles than you actually go. Have you calibrated your odometer with a GPS or over at least 10 miles of mile markers on the interstate?
