CK-4 oil
Anybody change to this new oil for their tow vehicle. chevman
Forum Discussion
Lynnmor wrote:FishOnOne wrote:
Then go with either Motorcraft 5w40 or Valvoline Premium Blue 5w40.
I may go with the Valvoline after my two plus years supply is exhausted. Note that the Motorcraft 5W-40 is not on the approved list.
That's because the Motorcraft 5W-40 is still CJ4 rated.
