[bushpilot]

WELCOME to the forum (neighbor) !

my F350 (crew cab, long bed, 4x4, SRW, 3.73 rear) gets 15-17 on the highway....when NOT towing ! Tow a large 5th wheel & you can expect to be to 10mpg or less.

you can buy a used tractor (500k miles is considered low miles) for about 30k...and get at 10-13 mpg. you can spend more single-ing the rear axle or building a deck etc.

I think the real issue becomes longevity, serviceability and safety....brakes, trans, engine are all built for significantly larger loads on a tractor compared to those on a 250/2500 or even a 350/3500.

of course you can spend 100s of 1000s on a factory conversion too.
or you can buy one thats already been converted for.

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