Originally Posted by Patrick0525
Wasn't the OLM as % was supposed to address OC OCD issue?
Yes, the problem is in certain instances the people run it to a % where the oil has passed its useful life. I confirmed the accuracy of mine with UOAs. Let me put it this way, running it to 10%, or even 20% would have been a mistake. I don't follow mine. Having said that having a UOA to determine accuracy of the OLM and how long to run your oil might be beneficial. I posted these numbers before, here is what a UOA told me:
I have the 3.6L in my 2016 Rubicon, I used PU 5W30 and a Fram Ultra filter. My OLM was currently @ 53% with 4,411 miles since the last oil change. UOAs show a TBN of 2.9 after 5K miles. 3,980 mile OCI had a TBN of 3.9. I settled at a 5K OCI, which is a year give or take and an easy number to remember. I know I can run the oil a bit longer than 5K miles, but certainly not to 10 or even 20% on the OLM.
Some people swear by them, some swear at them, I ignore them.