engine oil & quantity 6.1

yeah I run 5w-20 in my 5.7 hemi but I am pretty sure thats because of the mds, you dont have that in your 6.1 but I am pretty sure lighter weight oil is the way to go in the newer engines, I could be wrong, My stock 5.7 holds 7 quarts with filter. I run Durablend Valvoline 5w-20. fyi