Well, we got home and the Ultragauge still says 10.2 MPG. Can't complain about that! The Axis ran really well this trip. We're up to 6600 miles on the odometer. The V10 seemed to pass some kind of hurdle at about 5000 miles and now just hums along. Raton pass, in both directions was a breeze. We came home via Raton due to heavy rain predicted over the Rio Grande canyon and Taos.
I did drop the front tires to 70 PSI. I think the ride may have been a bit smoother, but it could well be wishful thinking. We were running on empty tanks (all of them), but I'm not sure if that improves or degrades the ride.
We did confirm that the gas tank holds 55 gallons. There was a thread on another board where someone claimed only 50 gallons are "usable". We had a "1 dollar off" deal at a local supermarket so we wanted to be nearly empty when we got home. I actually cut it closer than I wanted.
The "5-gallons left" light came on 3 miles from the station. It took 51.062 gallons!