Aisin seems to hate an easy life, it flares and acts up until loaded. Mine flared ( still does to some extent), but put 5-10k load on it and it's happy as a clam.
Curiously, granted it is a single anecdote, my buddy hauled with a 68 for about 400k and has been just singing praise about the tranny. I don't know if it was reprogrammed or what, but it did function properly without failure or inconvenience until he moved on to a 5500 with a 69 aisin.
Is there an existing filter that could take that kind of mileage? Makes me think the original OCI could have been ok without the filter change. I realize my question could be self answered but not sure if i can stare at 50 UOAs from a website forum format. I want unfettered access to blackstones database
DBL7349 I would not hesitate to run for an abusive interval. However, 15k for the up to 2018, and 20k intervals are factory for current cummins models, and the factory spec filters look to be blend media at best. Filter intervals for many cars and motorcycles have been 10-15k non severe service for aeons, so filters have been trusted to work a lot harder than by a lot of us consumers. I've pulled filters off neglected 20-25k mi oci cars with them sludged, plugged and black, but intact.
I personally will not use a filter for its "full potential" if there is a higher likelihood of failure. The aforementioned Donaldson and [so far] WIX has not failed on me yet, so I tend to run those as long as sanely possible.
I am curious about the consumption though, I used to add oil to old beaters when I was a kid, I knew where it went (puddles under the car). I had a new car with a defect that I added oil to, until the TSB work was done. But the rest, if ever consumed any amount would be always < 1/4 of the way within the safe zone on the dipstick. I can't possibly be this lucky, or do people react to oil consumption as "OK by design" and not look for issues to resolve the consumption?