Thank you for the input Moses. I failed to mention that I have the manual 6 speed, NV5600. The only other modifications done to the truck are a front load leveling kit, 5" exhaust and 55 gallon fuel tank. The tests were of course as controlled as I could make them so my real life driving will vary. I still have easy second gear starts and now do all my driving between 1400 to 1800 RPM. I will post more mileage specs as they develop.