Schaeffer's 10-30 GMC 5.3

[salesrep]

Gmc 5.3 liter !32k on engine 5.3k on oil. Schaeffers 10-30 1st or 2nd fill.

Copper 25
iron 19
chromium 1
Aluminum 6
Lead 87
moly 225
zinc 660
magnesium 24
calcium 1674
sodium.2311
potasium 733
H2O positive

visc 10.07
sae 30
sulfur 6
oxidation 0
nitration 2

This is from one of my Garage owners...that rarely collects samples. His customer complained that the truck began making clicking and clacking noises after they switched to schaeffer...ran it the 5k and switched back...the noises stopped. Got a call to make.

 

[Gary Allan]

..an that noise may return in due time.

Potassium 733 = this should be the phos level

Sodium 2311?-

 

[addyguy]

Sodium and Potassium at those levels is a massive coolant leak!

High lead would back up that this is destroying the engine. Hopefully, it can be saved in time!

 

[tig1]

Even though this is a new GM engine( they do throw some high wear numbers at you) it looks like an anti freeze leak. With the lead so high bearing damage may have occured. If I was the customer I would be thinking new engine while in warranty.

 

[salesrep]

132,763 on engine.
Sorry for the typo.

 

[INDYMAC]

Is this a classic headgasket leak signature?

Still using DexCool?

 

[Steve S]

sodium.2311
potasium 733
H2O positive