Needing a little help

[Lonestar10]

What's it pulling I've got 450/1650 doing flat bed I might not be first off the line or top of hill but I tend to pass all but 1 of our 15 trucks when they need fuel getting 5.5-6mpg and I'm getting 6.7-8mpg depending on the weather. The one truck outdoing me is a 2019 midroof cascadia with all super singles and the dd15 with dt12 automated Detroit trans. Other's behind me are couple Coronado's, t800, another t680, dad's 579, and assortment of w9s,379s,389s.