MP I know your right, but I think I would go nuts if I tried driving across the country or across Texas driving 55. Ain't goonna happen.
PJvH, I don't think either of those items would help mileage. Its all about getting the most out of the fuel your right foot in demanding and keeping weight and wind resistence to a minimum. Easy starts accelerate slowly, let the TC lock up before shoving down on the petal so that slippage is minimized.Also one of the most overlooked things is to not back off the accelerator too quickly. Try not to use the engine as a brake, just start easing back slightly and glide down in speed. I think your mileage is pretty good for the speed. Oh yeah drive 55, Noooooo Nooot Tttthhhhaaaatt Ssssslllllloooowww..
Add about 5 more pound of air in the tires also helps. Doesn't hurt the tires any either, I just turned 80,000 miles on the original Bridgestones that came on the truck this morning.
02 2500HD LT D/A SB CC 4X4 BLACK, Westin stainless nerf bars, BW GN Hitch,Racor 60S post oem fuel filter, Oil Guard bypass engine oil Filter. All synthetic fluids. Kennedy boost valve, edge, Modified air intake,EGT & Boost digital gauge,TransferFlow combo fuel & tool box, Air Lift Suspesion Bags Rear & compressor with remote, Bilsteins front & rear, Frontier front replacement bumper.