Posted 6/27/2026 10:25 (#11685980 - in reply to #11685630) Subject: RE: How important is api rating of engine oil?
Eastern Washington State
I would DEFINATELY only use a CJ4 or higher compression rated engine oil. I'd drain it right away.
This guy has a lot of info on how motor oils are developed for different applications. If he had one video that summarized the differences I'd post it, but you just have to look through his stuff. https://www.youtube.com/@themotoroilgeek
How important is api rating of engine oil?
