joshuaeb09
Senior Member
- Joined
- Apr 5, 2016
- Posts
- 1,426
- Reaction score
- 2,402
- Location
- Medina County, TX
- Ram Year
- 2022
- Engine
- 6.7 Cummins
I sort of wonder if the EcoD spec change wasn't so much that the difference between 5W30 to 5W40 was the solution but it clarified the correct oil for them. There were countless number of people reporting the wrong oil being used during oil changes. Several engine failures were reported within 1000 miles of an oil change and on the opposite end of the spectrum several owners went over 100K miles running 5W30 oil.
Unless someone from inside FCA decides to be a whistle blower and spill the beans, we may never know the truth about the oil with the Hemi and/or EcoD.
They also changed the TCM strategy to keep from lugging the Eco D which some suspect was causing accelerated wear on the bearings with less cushion from the lighter oil. Also from what I've seen that VM diesel was specing 5W40 in non US markets which immediately makes me think it was some CAFE BS that lead to specing the 5W30 to try and squeeze even more economy out of it.