Quote Originally Posted by DaveMcClain
I have a Gulf Stream Ultra with the Kodiak chassis, Duramax LLY,and Banks Six Gun, and at 55MPH, I achieve 15.2 MPG! When pushing to 65 MPH, level territory, the mileage drops to about 12.5. Must be wind resistance.
What does your rig weigh? I am considering putting a D/A into my 15,000# FMC in place of the original 440-I.