my 2013 runs pretty well on 5w20 M1. I'll be doing on UOA on it when I change it this weekend (5k miles, maybe early but wanna UOA and see). I've seen the same reports of issues with MDS if not using 5w20. I have a warranty for another 7 years 70k miles, so I'll be using 5w20.
It runs quiet on it, at 32k miles. One issue I had with MDS was I could feel it kick on and off. Turns out, changing the spark plugs made that completely go away. They're supposed to be changed at 30k miles (I changed mine at 29k). Of course you might not have this issue as I think 2014 and up are 100k mile interval plugs.