Ive had my truck for 2.5 months and have put 4000 miles on it. I have a magnaflow catback dual exhaust and an Air Raid CAI. I drive 80 miles to work and back on Connecticut highways which really sucks because our highway system is so small and congested. I get to use the cruise just a bit in the early mornings but forthe most part I take it easy (under 75). I hit 20mpg according to the computer. I reset in my driveway and see what it says when I park at work. Although I didn't buy my RAM for commuting efficiently I think it's great to get that kind of mileage and still have that power under my foot when I want it.