My ‘21 XLT 5.0 is getting 23 mpg consistently on interstate
driving when I keep it in the 70-72 mph range. RPM’s @ 1500
with 3:31 rears. Best it has ever run on the interstate was
24.2 mpg. Truck has 5000 miles on it.
Seems longer than normal. I placed my order at dealership
11/20/20. Truck was built at Kansas City 2/10/21 -shipped 2/12/21 - arrived at dealer 2/26/21. Took delivery 3/1/21.
14 days from KC to Richmond, VA.