Hello all, first time caller, long time listener here. Ive used this site for a lot of helpful information and Im hoping you all can help here as well. I have used Mobil 1 my entire oil change life so far(about 30 years) and have never had a problem. Recently we bought a Durango with the Hemi and I always change oil first thing. When we got it, it was running quiet and smooth. After I changed the oil to Mobil 1 with Wix it sounded more "clattery". We ran it for about 3000 miles and i contacted the seller to see what he was running. He used Valvoline, Im assuming Advanced. So, I just put in 6.8 quarts of Valvoline Advanced 5-20 with a Mopar filter. The "clattery" sound is gone again. I was never a fan of Valvoline as I just assumed it was cheap oil. After some research, I can now see that I am just an idiot. My question is, is Pennzoil Ultra Platinum what I should be using? I know its factory fill for some SRT Hemis, didnt know how it compared to the top tier Valvoline products? Anyway, thank you for any help, direction and advice!