2021 B6.7L maintenance intervals
I was going over the new Cummins engine offerings in our medium-duty brands at work and noticed a huge change in maintenance intervals on the B6.7L. The new oil change interval for the medium duty t...
Forum Discussion
FishOnOne wrote:
Does this engine have the CP4.2 HPFP and hydraulic lifters? From what I can tell it still has the CP3 HPFP.
Also with the improvements on viscosity control of the API CK4 oils that should help with increasing OCI's.
It is the B6.7L. Only the ISB6.7L had the CP3.
