I also use Fuelio and have for serveral years. I normally get around 42 MPG give or take. In fact, I noticed the last three fillups were down to 38. Which tell me I should probably replace the spark plugs, change the air filter and adjust the valves and other maintenance. at the end of August, we road 3500 miles round trip from Michigan to South Dakota with different leaders in our group. When I led or my brother led, I would get 46 MPG, when my son led, I got 34 MPG. The biggest difference is how well the leader was able to maintain speed on the highway.
I got a good tickle out that....
I don't have the patience to dawdle around on the road, I just set the GPS for destination and I get there as fast as the law allows. That does not make for the best MPG returns.
Also, as I mentioned, I live in the wide open spaces, and you can only enjoy about 2 miles of grassland and no trees or caves, or mountains, or other fantastic scenery.
I refuse to ride to Tulsa, and will use the US highways to avoid and go thru/around it, but I will not ride my bike inside Tulsa period.
too damn dangerous.