Magnatec was my "go to" oil for a long time. When I did my first oil change in my 2021 Ram 1500 w 5.6 hemi, Magnatec went in. Shortly after the oil change I heard some cold start "clatter". Ram states that this is normal, and not harmful (lifter noise). I didn't like it. Out came the Magnatec, and in went the Liqui Moly Special Tec AA 5W-20. I never heard the "clatter" again, and it runs great. The first oil analysis was at 6000 miles with TBN at 3.4. I will do another analysis at 7500, and that will probably be my OCI moving forward.