8.9 MPG in a moving truck

[2000mc]

Just moved so I thought I'd post mileage here.
Rented a 26' uhaul, gmc gas, didn't check which year or engine. Truck was packed solid, with only a few inches to the roof for most of the box, and probably a heavier load than typical with a large loaded tool box, and file cabinets loaded and many boxes of books, binders/ folders, and the like. Pulling a car trailer with the saturn on it for all but probably 30miles.
Ran a total of 720 miles using 97.771gal for 7.36mpg total
Best tank was almost all highway, averaging about 57mph I saw 7.56mpg
I'm guessing the bits around town,(moved stuff for wife's work at same time) loading unloading, the truck was getting 5-5.5mpg

[kafer65]

Got 11mpg from my neighbors v10 Dodge dually pulling a two car trailer with a Subaru. He was surprised because he usually got 8mpg no matter how he drove it empty. That's almost 30 percent improvement!

[dirtydave]

I rent 26' box trucks from penske on the daily for long distance and local for my moving company.
If I'm doing a long trip the first stop I make I go and check all the tire pressures.

I get like 9 MPG on a trip to Florida or Tennessee and back to Maryland half full half empty.
They all have 6 speed automatics and run on diesel.
They are governed at 70 MPH and lose alot of power going uphill even empty.
I don't make any effort to get better mileage or hyper-mile the only reason I check the tires is so I wont have a blow out. Customer pays for fuel. They can fit a entire house of things and stuffs so I think 9MPG is amazing.