I`m willing to bet that this unit is getting in the neighborhood of 8.5 - 9 mpg, and thats on pretty flat highways. Mountains would be a little less, around 8mpg. This setup is pretty dang close, if not more than what my empty weight would be on my semi(daycab) and 48` trailer.
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Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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