2002 Avalanche AMSOIL 5W30 111258miles

[jst4f]

I posted oil analysis results in 2/05 after 41K miles which showed a significant thickening in the oil after ~12K on the oil. Based on feedback from this forum I changed the oil from the 5W-30 ASL tp 5W-30 HDD and have much better results. See below.

Do any of you see any problems developing from these analyses? Any suggestions or hints? Thanks

2002 Chevy Avalanche K1500, 5.3L engine
No engine mods and non-turbo.
Mostly highway miles and no towing.

Mileage 41543, 111258
Time on oil 12880, 14049
Oil AMSOIL 10W-30, AMSOIL 10W-30
ASL, HDD

Iron 25, 23
Chromium 2, 1
Lead 22, 5
Copper 82, 24
Tin 0, 0
Al 7, 4
Nickel 0, 1
Silver 0, 0
Silicon 13, 1
Boron 29, 24
Sodium 11, 7
Magnesium 756, 11
Calcium 2533, 3779
Barium 0, 0
Phosphorus 1036, 979
Zinc 1312, 1365
Molyboenum 6, 14
Titanium 0, 0
Vanadium 0, N/A
Potassium 0, 2
--------------------
Fuel-prcnt vol Vis cSt 100C 17.07, 11.51
Water 0, 0
Soot/Solids N/A, 0.4
Glycol Neg, 0
TBN 6.57, 2.2
Oxid 22, N/A
Nitr 21, N/A

 

[oilboy123]

Did you run a EA oil filter?

 

[jst4f]

EA or WIX filters which I changed at each oil fill

 

[oilboy123]

Which UOA has the EA and which is a Wix?

 

[jst4f]

Not 100% sure. The first one as all EA but since then there has been a mix of EA and WIX. This specific oil change was a WIX filter. Why?

 

[Gary Allan]

I take it the first lab was OA and the second (?). No flash point so it shouldn't be B-S. The metals track well but the TBN probably uses a different protocol. HDD appeared to do well for just shy of 15k. Visc held solid.


Was this in for a year?

 

[Loobed]

Originally Posted By: jst4f
Not 100% sure. The first one as all EA but since then there has been a mix of EA and WIX. This specific oil change was a WIX filter. Why?



It looks like you have less wear metals with the Wix than the EA with 2000 more miles. There is also a difference in the amount of silicon with the 2 UOA. That may what caused the grater wear and not the filter.

 

[oilboy123]

EA has the Nano media and the wix does not correct? So I would assume the EA should filter better?

 

[jst4f]

Your good. The first UOA was OA and the second was B-S. What is the difference between them?

 

[addyguy]

Don't know what happened on your first run, but something 'broke' the oil, and it thickened like crazy and allowed insane bearing wear.

Second run is pretty darn good for 14k miles. Viscosity is solid!