My mileage has gone through the roof recently and I cannot figure out why. My truck has the mods in sig, 3.73 gears and I guess what are basically 32" tall tires. All towing is gone in Matt's tow tune as well. Normally, if I drive like grandpa, I am lucky to hit high 9's dragging my trailer down the road...typically. Loaded/empty, it doesnt matter! This last trip, I kept cruise control at 66 mph, or 1900 rpm give or take....24' enclosed car trailer that weighs about 4k lbs empty, with a 3k lb
car inside. I departed from Santa fe, nm topped off on fuel and reset my trip on my gps
...I cruised at 66, no downshifting on hills, truck pulled any hill in overdrive...got into Santa Rosa, nm 109.1 miles later, topped off....7.9 gallons, that's 13.66 mpg
for those following along. Second leg of the trip, Santa Rosa to tx state line, I forget the mileage, but it was right under 12. (lots of hills) anyways, my last tank, tye, tx to my front door (189 miles) only took 14.8 gallons. This is topped off to the very tip top, driven with a very tender foot, etc....is this #### even possible?! Or has my truck found a secondary fuel to run on that is offsetting fuel consumption???