Posted 6/26/2026 21:44 (#11685630) Subject: How important is api rating of engine oil?
Eastern SD
Changing oil in my 6.7 powerstroke and i noticed the 10-30 cenex oil i got was rated SN while the engine calls for a CJ4. Should i drain er back out and get some CJ4 or will it be fine for this round?
Thanks
How important is api rating of engine oil?
