Originally Posted by tiger862
NOTE: Mopar SAE 5W-30 engine oil approved to FCA
Material Standard MS-6395 such as Pennzoil, Shell Helix or
equivalent may be used when SAE 5W-20 engine oil
meeting MS-6395 is not available.
Lubricants which do not have both the engine oil certifi-
cation mark and the correct SAE viscosity grade number
should not be used.
Synthetic Engine Oils
You may use synthetic engine oils provided the recom-
mended oil quality requirements are met, and the recom-
mended maintenance intervals for oil and filter changes are
followed.
Synthetic engine oils which do not have both the engine oil
certification mark and the correct SAE viscosity grade
number should not be used
This is straight from manual. I take this as you should not use or else warranty is voided.
My previous post in the thread contains the actual page from the owner's manual:
https://www.bobistheoilguy.com/foru...ew-2019-ram-1500-oil-changes#Post5156151
And the page:
Quoting myself:
Originally Posted by OVERKILL
It (the manual) states that you MUST use an API-Certified lubricant in the correct grade, they RECOMMEND you use an oil that carries the MS-6395 Material Standard
They key language is:
Quote
Lubricants which do not have both the engine oil certification mark and the correct SAE viscosity grade number should not be used.
Meaning you should not use an oil that isn't API certified and of the wrong grade. All the verbiage with respect to the MS spec uses the word "recommended". The only part that clearly mentions a warranty issue is that with respect to engine flushes.