I sent Amsoil an email hoping it met spec and just hadn't been added but they said nope. What is the bother of hunting down this special oil if the dealer is gonna fill it with T6 anyway? I can get that anywhere. I'm calling my dealer tomorrow to see what they are using.
Got this reply from the Mobil folks today:
Thanks for writing to us. I'm sorry to say that I currently have no products meeting the MS-12991 spec. Last year's Ecodiesel in platforms like the Grand Cherokee and the Ram 1500 called for 5W-40 oils meeting Cummins CES 20081 or Chrysler...
Talked to a Valvoline tech yday. He said the MST has been discontinued but the European Car Formula meets the MS-12991 spec. They are working on getting it on the label now. I had no idea how difficult it would be to find "on the shelf" oil for this thing.
I don’t think my flares are on the same plane. JLUR EcoDiesel. Put a winch and winch plate on it and it squatted a bit up front. Thinking about a Dayster 1.5” in front and 3/4” in rear so I can do 35’s on factory wheels. Just want to pull good measurements