Crew cab 4 x 4 157”wb with 3.5 ecoboost & 3.31 rear end. I am meticulous about air pressure, tune-ups, air filters, etc. & mostly take longer trips driving like I’m old, because I am. Typically I get actual hand measured 21.5mpg. With a 36 gallon tank I regularly go 700 miles with 87 octane...