I got over 29 mpg!
After almost 2 years of ownership of my '09 FX with a stick and averaging 24-26 mpg, I did an economy run.
My wife was working this evening, I was a bit bored, so I did a solo freeway spin to the outlet mall about 65 miles away. I reset the dash mileage readout just before I got on the freeway, was running Costco regular gas (probably with ethanol) and did my best to hold speed between 60 and 65. Oh yeah, I did change my air filter element yesterday as well.
When I got home, it was reading ~130 miles and 28.5 mpg. I've got 215/70x16 tires on it, so adding 3%, this should be a fairly legit 29.2 mpg.
I passed NOBODY and spent the whole trip being scared to death that I would be rear ended and killed, so I will basically NEVER do that again....but it can be done. My wife has an '07 Civic and a 43 mile 1-way commute (mostly along that same stretch of road), and she regularly gets 34-36 mpg driving 70-80 (bit worse with winter gas).
George