I think a lot of problems is people buy trucks to drive like sports cars and expect 20 plus mpg . Well the thing is there a stiff ride very heavy and not ment to be driven so fast . I liked the day when the suspension was 2 times as stiff so you could actually haul something with out needing to add bags or more springs. Keep it at 65 and you will see good mpg ya 13 is good . Dont forget its a 7000lb truck