If I install a performance tune on the SCT. Starts out around 15-16, After 50 miles of steady interstate driving will finally climb up to about 20 and stay there as long as we are crusing at a steady speed. Steve
See sig for truck details. I bought it with 91,000 miles and now it's got 107,500. Over those 16,000 or so miles I've averaged ~17 mpg hand calculated. The computer typically reads 17.7 mpg. I run 20 miles to and from work each day, cruising at about 62 mph on flat to gently rolling terrain. I rarely do any "city" driving.
pretty much the same - around 15.5 in town. I got over 19 on a recent highway trip. with diesel running 30-35 cents a gallon more than gas around here the mileage is one of the reasons I've kept it... much better than the 5.4 I had.
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