VR1. Mineral or full synthetic

S'cuder said

Time and technology advance. True for cars and true for oil. My 2019 Jeep requires per the manual Mopar spec MS-6395 in grade 0W-20. I don't know if there are any that aren't synthetic based. The one recommended by name in the manual is. While that product will do fine, being in the manual was due to the FCA/Shell agreements. Would I use it in my 340? Not my preference, not often, and not long term, but it would work for one short oil change interval.

Click to expand...

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, less wear, 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.