Another issue is time. For the folks in the bus it slows down... but for the folks outside the bus it actually speeds up.... at 75 MPH it would take 7 days... etc, but inside the bus it would be like 5.5 days.
Fuel is like that too. Like when your parked for a while it seems to last much longer between fill ups. I swear, it seems like I havnt put any fuel in the Bus since it came home. My gallons per day average is almost zero.
Whats really crazy is the fuel economy we get with the Jeep taking it along behind. One time we filled it up at home, and still had half a tank when we got back. But when I calculated the mileage I was shocked to see it got almost 300 MPG.