ranchertx

I deleted mine at 4,000 miles. When I first deleted I saw an increase of 1-2 MPG. The computer was always real close.
Now at 15,000 I am seeing my actual mileage going down some. Last fillup was around 16.5 with mostly HWY driving (computer showed 18). The computer is still showing almost the same type of MPG as it was at first, yet, my hand calculated MPG numbers are going down. I reset the computer every fillup.

Every 3 or 4 fillups, my mileage will be almost exactly matching what the computer shows. Makes me wonder if the fuel stops are cheating on the pumps?

I am running mine on the +40 Setting.

Just curious what others are seeing with their Mileage, and how accurate their computer is? Do you get better economy with thew smarty set at factory horsepower, rather than +40 or higher?