engine break-in could go as far as 40k on a duramax, i would nor worry about some report, just change the oil every 5k, and don't sweat the oil lab reports it could have been tested on a friday evening. and copper= bearing wear?
X 2 actually I change mine @ 4k reasons below.
What most don`t consider especially one`s that has had previous different make diesels.
Fords Diesel, oil cap is 15 qts-----50% more oil cap than Dmax
Dodge Cummins oil cap is 12 qts---20% more oil cap than Dmax
GM Dmax oil cap is 10 qts.
Ford and Dodge and your local GM dealer recommends oil changes @ 5k heavy use-towing-hot climate, 7500 with normal use cooler climates.
These #`s are for longer lasting more trouble free engines or as most mechs say P.M. preventive maintance.
I have done the math and I just don`t get it on Dmax`s claim on oil life being longer.
I would trust a street walker before I would completely trust the engines computer oil life system %`s.
For me 50% is a good # to change, no longer, besides you should only believe 1/2 of what you see.
Especially with all this emission crap continually re-circulting thru the engine even more so than with earlier models.
The regens that adds more fuel to burn the crap build up in the DPF.
Have any of you monitored your oil life %`s before and after a regen.
Check it out for yourselves monitor the oil life during regens.
Heat is a factor that affects oil life as well,what does regens do ? creates excess heat for a period of time every 300-375 miles.
Sure, I have done oil analysis(anal) not so much anymore, and they all came back with more life left and everything looked good.
That was great and I`m glad I changed my oil at what I feel is a good time.
And if I`m getting ready to do some towing I`ll change earlier even at 3k.
I`m guessing most of you that are doing analysis all the time, its no wonder you want to go longer in between oil changes because of the cost of oil.
But your missing something you are not considering the cost of the oil analysis you spending everytime.
Have any of you actually talked to some of the people doing your oil analysis`s at these labs, I have.
There is usually one senior tech most of the others in the lab are goofer techs, even @ Blackstone.
For me after a few calls to have a few of the #`s explained.
I got real concerned when they did`nt know and can`t find out the answers to simple sample ?`s.
Can they really be trusted on doing a proper job, if they really don`t completely know what they are testing.
My conclusion was NO.