Four Wheel Drive Gas Milage

[nucklhead13]

Because I just got this 78 1/2 ton four wheel drive a month ago I need to make sure everything is running right before I take long trecks for some hay or feed.

First thing I need to know is what's the like new gas milage for one with a 350 and constant drive. At least I still remember how my 72 1/2 ton two wheeler was a ten mile a gallon rig.

Since I've been to several refineries and even remember how the delivery tanker trailers don't drain fully. And how a lot of gas is so messed up it can tear any carb up. I just need to know more on how my rig should burn gas right.