 I just took ownership of a Ford F-150 Platinum.  Edmunds didn't allow me to state I have a V6, it forced me to say V8.  Anyway, I just drove 600 highway miles between Santa Fe and Ft. Worth area.  No a/c, no unusual wind.  No speeding or unusual driving.  Ford says this truck should get 23 mpg-highway.  I got between 15 and 16.  I'm not dumb enough to expect exactly 23, but this is so far off, I have to lodge a complaint.  I know the fuel history gauge has to be sorta broken in, so I calculated mileage the old fashioned way, dividing miles driven by actual fuel used.  What the deal with this $60,000 truck that gets the worst gas mileage of any truck I've ever owned?  By the way, Edmunds would let me enter year 2018.  It forced me to enter 2017, but truck is new 2018.