When I drove my truck home from the dealer the computor said 19. 7 mpg I figured that seemed a bit high for a New truck with only 20 miles on it. Then around home windy hilly roads most of time I crusie in 5th only once on a while roads straighten out enough for 6th gear I was getting around 16. 4 Now after last trip to town I am getting around 15. 3 mpg . I got 16mpg with my 6. 9 ford on these same roads I only have 904 miles on my truck not bad for driving it from dealer 450 miles and now 2 months later it is still not over 1000 miles on odometer. Got to take a trip.