CK-4 oil
Anybody change to this new oil for their tow vehicle. chevman
Forum Discussion
Lynnmor wrote:FishOnOne wrote:
The cold flow viscosity between a 5W40 and a 10W30 are very similar.
Yes, but 10W-30 is not recommended for use with bio-diesel. Since it is almost impossible to stay away from the bio when traveling, we are back to square one.
Then go with either Motorcraft 5w40 or Valvoline Premium Blue 5w40.
