Isn't there any better way, I have a 03 4.0 liter 4x4 and the mileage for a 6 cylinder is pretty pitiful actually. I'm positive I get better mileage in my 82 camaro than I do in that truck. It doesn't seem to matter how I drive either it is pretty consistent at 13 mpg or so. City or highway I don't usually get any better than 400km or 250 miles on a to the brim full tank. It's gettin hard on my wallet at this rate. My truck only has 38000 km or around 24000 miles. My cousin who owns a 1500 extended cab Chev with a 5.3 which has less miles on it than mine gets over 20 mpg. What the deuce is wrong with this picture??