cat 3126 Schaeffers 15-40 14.8k uoa

[salesrep]

Sterling cat 3126 Engine oil is Schaeffers Supreme 700 15-40. 110 k on the engine.
1st column 10k on oil,2nd,5k, 3rd10.5k, 4th and last sample taken 14.8k

copper 5,2,4,223
iron 15,17,24,51
chrom 1,1,1,2
alum 2,5,4,8
lead 2,1,3,8
moly 80,349,299,420
phos 1112,1587,1289,1697
zinc 1244,1688,1429,1935
mag 50,16,16,15
calcium 3039,4814,3765,4762
contaminants all nil
silicon 11,11,9,14
visc 13.18,13.28,14.02,13.27
sulfur 11,6,7,11
oxi 5,1,7,2
nit 2,1,7,5
soot .2,.1,.5,.6

Two things really stand out. How well the additive package is sustaining and……….the copper.

 

[addyguy]

All the wear metals more than doubled from the 10.5k run, so I'd say you just went too far on the oil. But, all the other numbers look good - could it be a meachanical problem that caused the copper spike - ie., a bearing/bushing failure?

 

[Pablo]

Yes the copper stands out - so does the lab error. Big time.

 

[Johnny]

What vintage was this oil. The moly, zinc, phos, and calcium numbers seem to be very high on sample number 4.

 

[addyguy]

I think Pablo and SR are implying that the numbers on sample 4 probably aren't very accurate...maybe a re-run, Salesrep?

 

[D-Roc]

Chemical reaction with the copper? Cat states that this can happen . Viscosity looks good for a CAT engine w/ HEUI system.

 

[Pablo]

I am pretty sure the Cu is from some cooler or fittings...

I don't get the 10K, 5K, 10.5k, 14.8K - is that a typo or was the oil dumped after the first 10K and started again?

The bouncing additive levels are incorrect.

 

[huskerbill74]

The copper spike is coming from the oil cooler. This is a common trait of CAT engines, especially with "extended drain" type oils. There is a CAT bulliten on this very topic. A little research could find it. This copper spike will also come from any change in oil chemistry. The 30K to 40K mileage seems about typical of the munbers that I've seen on a lot of CAT engines. Continue with normal OCI's and the oil cooler will plate back up and the Cu number will drop and run back into the normal range.

 

[salesrep]

I am aware of the Cat bulletin and i suspect that the leaching is the culprit. Copper high readings alone are most always harmless to the engine.

I do not think that there is bouncing at all with the additives and for this long of run the wear metals look very good.

 

[Pablo]

Originally Posted By: salesrep
I do not think that there is bouncing at all with the additives.....


"1st column 10k on oil,2nd,5k, 3rd10.5k, 4th and last sample taken 14.8k"

Please explain what the first oil was. Can I assume the first oil was run 10K then changed?

Quote:
moly 80, 349, 299, 420
phos 1112, 1587, 1289, 1697
zinc 1244, 1688, 1429, 1935
mag 50, 16, 16, 15
calcium 3039, 4814, 3765, 4762


I will assume based on this the first oil was something different and the last three are the same oil over the miles. They change a LOT. Were additives being used?