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...
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Yea, I do mine every fall, about 9K miles a year. Doesn't burn oil, everything seems fine. I bought from a dealer that advertises a "lifetime" engine and trans warranty, so long as I can prove that I did routine maintenance per Ram specs. According to Ram, I need oil changes every 6 months, so I can kiss the idea of that warranty goodbye.
