Since my SRW was a Chevy 8.1L gasser that got below 10 towing our old TT & about 12 empty, I don't think it really compares to the DRW F350. The '06 DRW with 4.10 rear end gets 17 to 20 empty and 11 to 13 towing our Monty. That's both computed and by the gauge over about 5k miles total.
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