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LLY Duramax with Amsoil #5451647 06/11/20 08:45 PM
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Jmpage388 Offline OP
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15k on oil. Large spike in copper. Do I change the filter and top off or full oil change

144,374 (5192) 149,786 (10631) 154750 (15950)
Iron 10 14 27
Aluminum 2 1. 2
Copper 3 12 308
Lead 0 1 6
Tin 1 0 1
Cadmium 0 0 0
Silver 0 0 0
Vanadium 0 0 0
Silicon 5 6 9
Sodium 3 6 6
Potassium 1 0 3
Titanium 0 0 0
Molybdenum 0 0 0
Antimony 0 0 0
Manganese 0 0 0
Lithium 0 0 0
Boron 47 29 21
Magnesium 814 740 789
Calcium 1361 1247 1306
Barium 0 0 0
Phosphorus 1134 1103 1125
Zinc 1280 1207 1186

Re: LLY Duramax with Amsoil [Re: Jmpage388] #5451650 06/11/20 08:49 PM
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[Linked Image]

Re: LLY Duramax with Amsoil [Re: Jmpage388] #5451679 06/11/20 09:52 PM
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Danno Online Content
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I'd be changing oil and filter. Try to find out where that copper is leaching from. A cooler failing?


2019 Jeep Grand Cherokee Summit 5.7L Hemi
2019 RAV4 Limited Hybrid
2016 Sorento SX V6 AWD
2010 Mazda 3 2.0L
Re: LLY Duramax with Amsoil [Re: Danno] #5451761 06/12/20 05:38 AM
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Originally Posted by Danno
I'd be changing oil and filter. Try to find out where that copper is leaching from. A cooler failing?

745 hrs run time on the oil I know amsoil has always acted a little funny with the oil cooler. No coolant in the oil

Last edited by Jmpage388; 06/12/20 06:05 AM.
Re: LLY Duramax with Amsoil [Re: Jmpage388] #5451883 06/12/20 08:55 AM
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Why would you want to change the oil with 15,000 miles on it. Oh wait . You are the one paying for the overhaul not Amsoil.

Re: LLY Duramax with Amsoil [Re: rideahorse] #5451916 06/12/20 09:31 AM
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Marco620 Offline
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Originally Posted by rideahorse
Why would you want to change the oil with 15,000 miles on it. Oh wait . You are the one paying for the overhaul not Amsoil.


+1 . Think 15,000 miles is long enough and maybe too long honestly.Takes some pretty strict operation to even go longer than the factory MM.


15' Civic r18, 345,400 mi M1 5w30(3qt)/Redline 5w30(1qt),Castrol CVT Fluid,Redline Si-1
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Re: LLY Duramax with Amsoil [Re: Jmpage388] #5451952 06/12/20 10:08 AM
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Danno Online Content
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Originally Posted by Jmpage388
Originally Posted by Danno
I'd be changing oil and filter. Try to find out where that copper is leaching from. A cooler failing?

745 hrs run time on the oil I know amsoil has always acted a little funny with the oil cooler. No coolant in the oil

If it was my vehicle, I'd run shorter OCI at max 10,000 miles, with a mainstream oil such as Delvac or Rotella 15W-40.
Nothing to act funny that way. The high copper is concerning imo.


2019 Jeep Grand Cherokee Summit 5.7L Hemi
2019 RAV4 Limited Hybrid
2016 Sorento SX V6 AWD
2010 Mazda 3 2.0L
Re: LLY Duramax with Amsoil [Re: Jmpage388] #5452352 06/12/20 07:02 PM
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Is this the first run with Amsoil??? If so, this Cu spike is a harmless reaction; a chelation of Cu due to the amines in Amsoil (if I understand the chemistry correctly). The only downside to this effect is that it will completely mask any true Cu indicator from other problems; if you do get a bearing going bad, you'll never know it with such high Cu spikes. The spike will subside over several OCIs; the Cu will normalize to the amines and the chelation will stop, or at least drop dramatically.

The Pb is a tad high, but nothing worth panicking over. Pb can hop up/down every once in a while, so just see what happens in the next UOA. Only if the Pb continued to escalate over three successive UOAs would I be concerned; I doubt that's the case here. I had a spike in Pb in my LBZ Dmax once; it came right back down on the next UOA.

The other wear metals are perfectly in line with normal wear rates; nothing to worry about.

Last edited by dnewton3; 06/12/20 07:04 PM.

The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money
Re: LLY Duramax with Amsoil [Re: dnewton3] #5452371 06/12/20 07:43 PM
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Originally Posted by dnewton3
Is this the first run with Amsoil??? If so, this Cu spike is a harmless reaction; a chelation of Cu due to the amines in Amsoil (if I understand the chemistry correctly). The only downside to this effect is that it will completely mask any true Cu indicator from other problems; if you do get a bearing going bad, you'll never know it with such high Cu spikes. The spike will subside over several OCIs; the Cu will normalize to the amines and the chelation will stop, or at least drop dramatically.

The Pb is a tad high, but nothing worth panicking over. Pb can hop up/down every once in a while, so just see what happens in the next UOA. Only if the Pb continued to escalate over three successive UOAs would I be concerned; I doubt that's the case here. I had a spike in Pb in my LBZ Dmax once; it came right back down on the next UOA.

The other wear metals are perfectly in line with normal wear rates; nothing to worry about.

Yes first run with amsoil.

Re: LLY Duramax with Amsoil [Re: Jmpage388] #5453492 06/14/20 07:47 AM
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Well there you have it; Cu spike due to the reaction of using the Amsoil.

NOTE: do NOT construe this to mean using Amsoil is bad; that's not at all what I'm stating. The Cu chelation is a side effect of the oil's chemistry, and it's not unique to that brand; other oils have exhibited that same effect at times.

Until the Cu reaction subsides and returns to "normal" (statistically speaking), you'll have to ignore the Cu readings and rely on Pb for indicators of bearing issues.


The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money
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