Amsoil Sig 10w30, 10K, 07 Chevy 3500

[TXHunter]

Around the 5-6K mile marker the owner had a rear main seal leak in the engine and had the gaskets replaced. I believe that is mostly responsible for the large spike in Silicon, although the high wear numbers also indicate that dirt could have been dumped in the engine during this work.

Make/Model: GM 8.1L V8
Vehicle: 2007 Chevrolet 3500
Oil: Amsoil Signature Series 10w-30
Filter: Amsoil EA

Code:


OIL Amsoil 10w30 Amsoil 10w30 Valvoline 10w30

MILES IN USE 10,389 6,000 3,000

MILES ON UNIT 140K 130K 123K

SAMPLE TAKEN 4/17/13 10/23/12 9/5/12

MAKE UP OIL 5 QT 2 QT 1 QT



IRON 124 34 10

CHROMIUM 3 1 0

NICKEL 2 1 0

ALUMINUM 33 10 3

COPPER 3 1 0

LEAD 11 14 8

TIN 1 0 0

cADMIUM 0 0 0

SILVER 0 0 0

VANADIUM 0 0 0

SILICON 69 27 12

SODIUM 96 78 177

POTASSIUM 9 4 0

TITANIUM 0 0 0

MOLYBDENUM 150 144 31

ANTIMONY 0 1 0

MANGANESE 33 30 47

LITHIUM 0 0 0

BORON 70 67 0

MAGNESIUM 23 19 17

CALCIUM 3495 3556 2298

BARIUM 0 0 0

PHOSPHORUS 769 727 773

ZINC 861 848 861



Fuel %
soot %
Water %
Visc @ 100C 11.2 11.0 8.9

Base Number 3.40 5.54 4.55

Oxidation 52 48 10

Nitration 15 11 8

 

[dave123]

5qt's make up oil?

 

[TXHunter]

See the oil leak comment above...

 

[Rolla07]

Yeah, hard to judge a UOA based on that much make up oil... Seems like you are using some oil in this truck. Maybe time to look at a HM oil???

 

[TXHunter]

See the oil leak comment above...

 

[Spector]

huge spike in iron and that is normally wear. Silicon from seals/gaskets does not cause wear your iron really spiked!

 

[Clevy]

Those numbers make no sense.
Now if we go back to the valvoline sample and iron shows 10,but the amsoil at roughly double the mileage has over triple the iron on sample 2 then sample 3 goes thru the roof.
And there is that much iron in a sample that was diluted with 5 extra quarts of oil.
There has gotta be something either wrong with the sample or something really wrong with the engine itself.
Go back to conventional and try and establish some kind of baseline then decide from there if using a syn is cost effective. By the looks of it your engine is dissolving

 

[147_Grain]

You might want to check for a vacuum leak in the intake manifold, air filter housing, hoses, and etc... as the silicon levels are high and iron is way up.

 

[dnewton3]

After a major engine service (seals/gaskeets replaced) where work was done and dirt likely got in, there is no ability to really see anything clearly.

Do a couple of OCI flushes at whatever interval they choose, and then sample again. Get the noise out before you make any conclusions.

 

[demarpaint]

Originally Posted By: dnewton3
After a major engine service (seals/gaskeets replaced) where work was done and dirt likely got in, there is no ability to really see anything clearly.

Do a couple of OCI flushes at whatever interval they choose, and then sample again. Get the noise out before you make any conclusions.


Exactly.