68PowerWagon
Senior Member
- Joined
- Nov 26, 2015
- Posts
- 1,666
- Reaction score
- 976
- Location
- Dayton, Ohio
- Ram Year
- 2022 Laramie 3500
- Engine
- 6.7 CTD
First diesel I have ever owned. I know most people don't trust what the dash tells you, but my past vehicles have never been off by more than 1mpg from hand calculations. Anyway mine will be showing 20mpg rolling down the highway for maybe a good 20 or 30 miles then will drop pretty fast to about 18mpg. with all of the same road conditions. Does this erratic reading have anything to do with the DEF? Maybe injecting more or less at one given time over the other? I have yet to do a hand cal. on it, as I have only had it about a month. And no, I am not complaining about the mileage... this is GREAT compared to my 2016 6.4 gasser I had.