DIC MPG calibration

[71_340]

I upgraded my 2020 Tradesman 6.7L from the 3' DIC to a cluster with the 7" DIC.. Prior to upgrqading my MPG readout was pretty much spot on (+/- 1 at the most), now it is of by a bout +4 MPGs. I thought all that infor came from the ECM but that most likeley not the case since I didn't make any other changes. My question is if the MPG gauge can be calibrated to read more accurate as it did with the old cluster.

Thanks