olyelr
Senior Member
The Amsoil 0W-40 meets the MS-12633 requirements and so I believe that meets the Mopar seal of approval.
https://www.amsoil.com/newsstand/articles/premium-protection-for-high-horsepower/
It meets my seal of approval lol. That what I have been using in my truck.
It states right on their website that is works in the Ram 2500/3500/4500/5500 equipped with the 6.4.