Dang dude I can't get more than 14.8 in Colorado or anywhere east either. Tons of tank to tank interstate runs at 65-75. Jealous you're getting that lifted twice as much as I am and with larger tires.I have a 2017 F150 w/ the 3.5. Been running 35s w/ 6” lift for a year now and 18k miles. Live in CO and has no problem getting up and going. You’ll be fine on 35s. I run 15.5mpg on city and 17 highway.
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