Just got my e-con installed and I find the power is great. Where I was in 3rd at 99% Load it runs now on 4th at 74% load. I get around 19 MPG and so far have not seen to much increase in MPG. I had it set on setting B, I have now set it on setting A. The reading on MPG are completly out out of sink on my indicator. I was off by 38% on the millage indicateor that showed 26MPG and actualy 19 MPG. Now it hardly shows above 14 MPG but I am sure it is also off. So I have reset and will know when I do a long trip again. Sure hate to take the truck out with fuel at over $6.00 per USG here in NB, Canada. I was getting great fuel millage before installing the E-Con compare to last summer. It was in my driving habit.