Aloha,
I have a 24 OR long bed daily driver on the H-1 and can be hectic, keeping it 60-65 and averaging 22.0 to 22.7 mpg. sometimes 23 and have 4650 milage running shell ultra since new with break-in oil changes at 600 miles and 3600. I am not sure if it's the fuel or diligent break-in that is...