Forum Discussion
Cummins12V98 wrote:
It would be interesting to see if you are running you oil too long or not long enough.
Exactly. But once you get a few OCI into ownership, you've pretty much got the info and then you can back off on test frequency.
Until you change oil brand or weight. For example, I learned that Rotella 5W/40 synthetic was badly sheared down by the time 5k rolled around, and needed to be changed at about 3k. I was clued in by the injector noise too, but the tests told the whole story.
I don't run that oil anymore. It wasn't worthwhile.
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