New Ram/Cummins vs GM/Duramax on the IKE

FishOnOne wrote:

No official links but my cousin mentioned that the service department has received several complaints on fuel economy on the '19 trucks are noticeably lower when either pulling or running empty. Also I spoke with a hot shotter who I know that handles a lot of our material handling between our sites reported lower fuel economy compared to his 4 gen. It maybe a bit too early but it sounds like something is going on.

Also as a reminder and that you said on this site one of the reasons the cummins makes better fuel economy vs the other 2 diesels is because of it's higher compression and that it makes the engine run more efficient.

Hmm. Again, I have been hearing the opposite. My BIL just got a new 2019 service truck that replaced his 2016. Same specs and all and he said his posted less fuel economy at first, but then started to climb to what his previews truck was getting after around the 2nd oil change. Lavon Miller and a few other stated roughly the same thing in their blogs. This is common for most engines until they are fully broken in.

I guess we will have to wait and see who is telling the truth when we get more records on Fuelly. So far, it is lower than the 2014-2018 Cummins trucks, but having a lower than previous years average is normal for most vehicles posted on fuelly until they start getting more miles recorded.