There are a lot of variables to increase MPG. My MPG increased by 35% when I was driving in Texas versus Chicago. Could be the gas blend, non-ethanol, the lack of traffic, etc. Cruising at low speeds makes the biggest difference. I'm usually going around 80-90, but if someone is cruising at 55, they'll get far better mileage.
2015 Valkyrie; 2004 V-Star 1100, 1997 Goldwing Aspencade