Which Fram Oil Filter.

I was selling Dodges when the Cummins came out and there was a rash of engine failures after a few years . The engineers couldn’t figure it out so they had us ship dead engines back to Detroit for autopsies. What they discovered was cheap oil filter fillament debris was clogging the oil galleys . They issued a TSB with a list of approved filters to use . They would void warranty if they found a non approved filter on a failed engine .
FRAM was NOT on the list . WIX was .