Break-In...2021 6.7 HO

[Scottly]

2021 3500 with ** Cummins and Aisin trans....When I took delivery, this thing seemed down on power from my previous 2018 Ram 2500. Owner's manual indicates engine break-in is not necessary, but also that it may use higher amounts of DEF and fuel during break in. I noticed the higher DEF usage and fuel economy isn't great, but I attributed that to the ** version. This is where I seek knowledge if you have it...

At 2K miles on the ODO, it seems like this thing woke from a slumber. It has more power. I'm not dreaming this. I know other makes have limits built into their ECM programming for break-in periods, and you can read about this in some dealer bulletins.
Is RAM doing this also on these trucks? It would explain what I am experiencing.

 

[Daw14]

Both gasoline and Diesel engines in these trucks seem to have that same experience. They claim no break in is needed, however they sure run better after some miles.

 

[JayLeonard]

I did not feel that difference in mine. Maybe my foot is too light.

 

[BossHogg]

New truck, everything is tight and doesn't roll well until it starts to be driven and parts wear in. Go get a new set of tires installed on an existing well-driven truck, at first drive, it will feel as if you are pulling an anchor.