[bigman55434]

I asked the tech what this re-flash was for and exactly what improvements it will make, his response was," I don't know it just said recalibration." Does anyone know what this flash changed? I believe I'm seeing an extra mile per gallon making my same drive to Baltimore from Harrisburg PA.

I believe it affected only the SCR system, including the heaters. They extended the run time of the heaters in cold weather, to help avoid some of the freezing issues in super cold weather.