Using a higher quality oil than the factory recommends is an excellent choice.
Looking at what oil weight the factory recommended years ago in their engines doesn’t mean the newer engines require the exact same weight.
The factory’s constantly have these engines running 1000’s of hours of endurance and reliability on in house dynos when making changes. Improvements in machining and product internals are continuously happening.
Look at the 2020 Ram Hemi manual recommended oil and it reads 5w20 MS-6359. Says nothing about Synthetic. The engine oil filler cap also shows there recommended engine oil viscosity for your engine. There is no other listing in the manual for sever use in oil as well.
Here’s the Factory Mopar engine oil that the dealer is putting in the 2020 Hemi when changing. This should also be the same oil that the engine was run on in the dyno sessions.
http://pqiadata.org/Mopar_MaxPro_5W20.html
Look at the 2022 Ram Hemi manual and it reads 0w20 “Full Synthetic” MS-6395. Big difference.
For the sake of discussion here’s the 5w20 oil I used in my 2011 Hemi Ram for the entire 179K miles (3700 hrs) with 84k of that towing a 7k# trailer. I religiously changed the oil every 3000 to 3500 miles because I have a lift and this Citgo oil with Wix Filters are inexpensive.
http://pqiadata.org/CITGO_Supergard_5W20.html
This is Semi-Synthetic which means 25% Synthetic at most. There is also no listing on the back of the Citgo oil bottle for MS-6395 compliant. Why? Because Citgo never paid for this certification. Same as Mobil1 that Does Not have this MS-6395 listed on their bottles. Does that make it the wrong oil. Heck NO. It’s API certified (exactly what the owners manual states) SN and meets the required specifics for motor oil in the 2011 Ram Hemi.
Lastly, if you want to see what’s in the oil you purchase, this website that I pulled the Mopar and Citgo samples from is an excellent resource for consumer, commercial, and industrial lubricants. They buy the product off the shelf from around the country and analyze it for content.
https://pqia.org/