You are more trusting than I. I tried a low viscosity Mobile One, back in the day, took the 4 speed 273 Barracuda out and thrashed it hard for 15 min. Did not like the hot idle pressure when I was done, drained it and went back to Valvoline 30 Racing. Ran the same Valvoline Racing 30 in a 1996 ACR Neon. 250,000 miles on it and it still runs like new. I run Valvoline synthetic 10w-30 in the three new 5.7 Hemi in the 2009 to 2018 Challenger and Chargers. I won't go below 10w-30. I also worked with someone who tested motor oils. The take a way from her was 10w-30 was the best lubricating multi grade. In my old cars, including a 2001 Jeep Cherokee, Valvoline 20w-50 Racing is my winter oil. I don't care what MOPAR is recommended anymore, I'm not sure they are looking for the best longevity of my motors.