FCA says to follow the oil life meter, so I did. Factory oil stayed in till 10,144 miles, about 80 miles past 0% if I remember correctly. I'll be doing this for every oil change going forward.
I paid $60 for the tests I had done, here is a linkHow much was this service and how quick did you receive the report?
Counter intuitive, but technically you can see more wear in a sample when changing the oil early (when compared to averages). At least that's what I've read on BITOG. Not to say that it is bad for your engine, because we are talking about very very small amounts here. As in barely perceptible, and it will take many oil changes and a fair amount of consistency to get good data.No thanks! 5k mile changes for me.
I’ll probably do the standard test and the soot test, which comes to $40, from now on... Sure it adds to the cost of maintenance, but I’d like to have it documented, to share with everyone. For 2 reasons actually...
I learned many years ago that oil changes are cheap insurance. On a car the savings isn’t that big of a deal, however, with 9 qts of synthetic and a $90 oil filter that’s not the case with the 3.0. But still, in the big scheme of things, extra oil changes aren’t going to bankrupt me and given the history of the modern diesel’s emissions issues I still think it’s worth it. I will say getting periodic oil samples with soot testing is definitely a good thing! But even with sampling, a 12k interval is long time to hope nothing has contaminated the oil, like internal metals and soot.That's 2.4 times as many oil changes than their recommended 12k interval.
At $40 per test, the break even point is around $28.50/oil change.
You do you buddy. Nothing arbitrary about it. A 12k interval gives you zero chance to catch a problem before damage is done.I’ll never understand people who dogmatically subscribe to arbitrary OCIs, well under the manufacturer recommended OCI when blackstone and other UOA providers can supply objective testing to tailor OCIs to specific engines...for a lot less money than doubling the rate of oil changes.