So this would be perfect then for the oil and filter combo https://www.amazon.com/Engine-Penzoil-Platinum-Synthetic-Filter/dp/B07V49WGHX/ref=mp_s_a_1_3?adgrpid=57632298618&gclid=CjwKCAiAksyNBhAPEiwAlDBeLOgp20XlyEBbLtRTAAIPK5vJJWgyT3-3vqGOS6m6FnLZKOgqRwC7XBoC24IQAvD_BwE&hvadid=274688401677&hvde...
Use the OG stuff from Mopar. Penzoil and a mopar filter. There's a guy on Amazon selling a full kit for the 6.4 with proper amount of oil and correct filter.
Edit: here
Just an FYI, there is an oil formula specifically designed for your car.
https://www.amazon.com/Engine-Penzoil-Platinum-Synthetic-Filter/dp/B07V49WGHX
Supposedly the wrong oil can negatively impact the MDS.