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Since when?
Rotella T6 is correct for the 2014-2019 Gen2 EcoDiesel.

The manual for my 2022 says
“We recommend using 5W-40 synthetic engine oil such as Mopar® that meets the manufacturer Material Standard MS-12991 and the API SP engine oil category is required.”

Rotella does not

I’ll have to take a look at that. Been using it for 65k miles at 10k intervals with no problems.
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