Nice truck my buddy just picked

Comparing them to a 95 dodge with a cummins and they are terrible, comparing them to modern hemi and they are within a few miles per gallon I'm guessing. Thing is they seem to do about the same mpg empty or loaded in the 4x4 model and they are heavy rigs for sure!.
I should say I am a big fan of them for a gas powered tow rig, they are overbuilt and the engines last forever.