13 highway is about what we get out of deleted 6.7's..
I have a 2017 F250 crew cab with the 6.7l with 38k miles. If I keep it under 70mph on the highway I get 18+mpg! If I go 75+ the mileage drops to 15ish. Pulling our 28’ Jayco we get 10-11mpg thru the CO mountains. Pulls like a dream, we love it, but I could be talked into a 7.3l gasser due to the added cost of diesel fuel and repairs! So far no problems....yet!
Elk Country
