Just returned from a weekend of camping with our EB ... was 10.0 mpg to camp and return camp was 10.9 mpg.. 5ver cat scaled at 10k lbs. speed were 60-65 mph. I have towed this same 5ver and same route with 4 different vehicles (2v v10, 3v v10, 7.3L, 6.2L) and this truck as netted best economy of all.