Re: 6.0 best fuel mileage
I have just the mods in my signature and drive it mostly on the highway with a few stop lights, I have smaller tires than stock and drive it with IDP economy tune, and don't stand in it very often, just enough to keep the turbo cleaned, but I get 17-19mpg a lot of it depends on how you drive. I'm waiting to see what I get when we get regular diesel fuel instead of the winter blend. I have about 150,000 on the truck now.
2004 CC/SB 4X4
4" straight piped, Sinister Egr Delete,
Edge Insight CTS, Sinister coolant filter,
Sctx3 tuner with Tunes from IDP
Swamps 58V FICM