good looking rig, mj. i have been a dodge truck guy since '72, but after driving my wife's tahoe (02) with the 5.3, my next work truck will be a chevy/gmc. she was getting the same mileage your getting, but my mech suggested we switch to mobil 1 syn oil, i thought it was bs. we took it on vacation this summer pulling a trailer with gear & 2 kayaks and got an honest 20 mpg highway, 17 in town. i put it in my work truck and went from 10.5 to 12.5.
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