Low priority...but just one of those things that is bugging me. My fuel consumption or gallons used is always quite a bit off. I am wondering if there is a place to correct this in the tune? I haven't found anything, but thought maybe someone knows where that calculation information comes from. I have correct my speedometer but I just don't know how to correct the gallons used or whatever fuel usage data the computer uses to calculate MPG. Oh, this is on my 2013 Ecoboost F150.