I don`t know how it works so this may be a stupid question but, why doesn`t someone put the software in a" box " to correct your overhead? It seems that everone`s is off so why not give us the option of correction? Mine is almost exactly 2 MPG off.

 

Mine is exactly 2 mpg off, they must not think that it is off or that this way of calculating it is better now. I do know that they changed the way it is calculated recently. (04 I think)