If you're towing, I'd definitely be running 5w-30. Redline is popular, personally I'm running HPL as its a better oil.
The 6.2 recall is due in part to rough surface finishes, the rougher the surface the higher viscosity you need to get that film. But we can apply this same reasoning to our hemis, the cam lobs are often worn down and it starts with surface delamination of some sort, a higher weight oil can mitigate this all or in part.
I've run mobil 1 0w-40 in my truck, absolutely 0 issues with the viscosity and MDS, but I don't use MDS either I just let it turn on a few times to see what would happen. I just don't think Mobil 1 is in the same class as HPL.