I wish my truck got half as good mileage as balls I have done the math and I'm getting 10.1 on the highway in cruise control at 75mph
33" tires, more lift, and a big honking air dam on a roof rack tend to make that happen. Especially at 75mph in cruise. Believe me, I know. But I'm at more like 14 and change under those conditions. When I keep it under 65 and drive the hills with my foot instead of the cruise I get more like 18.5
And even without the big air dam on the roof it gets 11
Technique my man. Technique. How quickly you get from 0 to 75 could have some bearing. :becky:
Where does one get 100% gas and 0% ethanol? I'm checking the pumps just to be sure they don't start adding more ethanol.
Stock configuration
100% Gasoline, 0% Ethanol
19.8-20.2 mpg mostly hwy <75mph
Stock Configuration
90% Gasoline, 10% Ethanol
19.4-19.6 mpg, mostly hwy <75mph
Stock Configuration
90% Gasoline, 10% Ethanol
19.1-19.5 mpg, almost exclusively hwy ~77mph cruise
Stock Configuration w/BFG KO2 275/70R17 E's
90% Gasoline, 10% Ethanol
17.6-18.3 mpg, almost exclusively hwy ~80mph cruise
Studied over last 10k miles. Current mileage 30378. Mileage driven with trailers attached ignored.
Variances based on grandpa and lead-foot moods and traffic impediment.
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[*]Do folks see a similar drop with lighter C rated tires? Yes
[*]What about stock size KO2s? Yes
Completely agree on ethanol. A few years back driving cross country I saw a ±10% increase in mpg in Oklahoma and Texas on pure gas.
Any AT tire even in a C rating, is going to affect the rolling mass over an all weather tire like the factory Dunlops. You just have more rubber mass and weight to roll. It's why those econobox cars that get such good mileage run 13" skinny tires.