Delvac 1300 15W40, 2003 GMC Duramax 7375 miles

[Pick]

2003 GMC Duramax Diesel 6.6 L, 7375 miles on oil, 9975 miles on unit. Second oil change, first done at 2600 miles. Baldwin Filter.
Sample Date 2/28/04

Aluminum 4
Chromium 1
Iron 12
Copper 22
Lead 7
Tin 7
Molybdenum 37
Nickle 0
Manganese 0
Silver 0
Titanium 0
Potassium 0
Boron 33
Silicon 38
Sodium 2
Calcium 2547
Magnesium 479
Phosphorus 1095
Zinc 1214
Barium 1
Viscosity 71.8
Flashpoint 455
Fuel % Antifreeze 0
Water 0
Insolubles .3

comments were to run a shorter OCI this time, to speed the break in and get abrasive wear materials out of the engine.

 

[Doug Hillary]

Hi Pick,

the soot level is important with any diesel engine - it is NOT shown on your UOA

Regards

 

[wwillson]

quote:

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Originally posted by Doug Hillary:
Hi Pick,

the soot level is important with any diesel engine - it is NOT shown on your UOA

Regards

---

Doug,

Please correct me if I'm wrong, but aren't insolubles and soot synonymous?

BTW - thanks for all of you insight and candor on this forum!

 

[Doug Hillary]

Hi,
wwillson - firstly thanks for your comments

"Insolubles" can mean different things to Labs and others and can be confusing. Some Labs embrace soot in the insolubles description

With a diesel UOA, soot should always be shown seperately - it is one of the defined "Action" factors with diesel engines

Insolubles can be described as pentane, toluene or benzine insolubles - and mean various things to all and sundry

Any Lab doing a UOA on a diesel lubricant for me would be instructed to treat soot independently

Kind Regards
Doug