I recently installed Dynomite's stage 4's, but slid my plate all the way back to save the clutch till this summer. Anyhow, the best freeway milage I could get with the banks plate in stock position or my ground plate forward with stock injectors was about 18-18.5mpg thats cruizing at 75 to 80mph.
Well with the Stage 4's,
15miles in the city +
60miles at 60mph +
200miles at 77mph (2250rpms) = 20.2 mpg
Thats over a 1.5mpg increase over the banks plate and stock injectors!
20.2mpg on the interstate is fantastic IMO, plus I have 650lbs of steel plate in the bed (from plowing season). I know its only a 1/2tank test but so far so good.
I figured some might find this interesting, I'm excited to see what I can do this summer with the compounds built/installed...
Tim.

 

I'm getting 21,5 with my setup.