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  1. M

    Poor gas mileage

    I AM the guy with the smaller smoother street tires, 3.21 axle, normal ride height with active air deflector. I am pulling 12.5mpg ALL MONTH no matter what I do. Looking for a factory difference in something like the ECUs that they are using....
  2. M

    Poor gas mileage

    You're averaging 24mpg with the same gearing as me, and I'm at 12mpg. I don't have eTorq, but nobody says eTorq is good for an additional 12mpg.
  3. M

    Poor gas mileage

    Getting back to the O.P. question - has anyone figured this out? By "this" I mean that some 5.7s are getting 18-19mpg, and some are getting 11-12. It's NOT the gearing. I have 3.21 gears and I'm getting 12.5 all day, every day. Nothing added to the truck, no mods. Not in 4wd. This is a 2021...
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