nickw
Adventurer
Not nitpicky....Not trying to be too nitpicky, but what kind of consumption does a gas 1t p/u get with a big, heavy cabover camper? In mixed driving, hwy ~ 65mph, secondary roads etc? I really don’t know, not trolling, but I do know the class Cs that are ubiquitous around here in the summer as rentals are pretty abysmal (7ish?). Considering their GVW of mere 14.5k lb.
I'd guess 8-10 mpg - guessing a mog is in the same ballpark. My rule of thumb has always been a lighter duty gas rig = heavier duty diesel rig, adding weight changes that dynamic a bit and so conditions but seems to work out on average. That is 'official' / rated mpg....ignoring the guys that get 50% better due to creative math.
Midsize gas = 1/2T diesel
1/2T gas = 3/4 or 1T diesel
3/4 or 1T gas = medium duty diesel / Mog
Etc.