Schaeffer 7000 in 2003 GMC 2500HD

[03HD]

ok guys help me out, i'm not sure what everything means as this is my first UOA.

2003 GMC Sierra 2500HD 6.0L V8
Schaeffer Supreme 7000 5W30
Oil was put in at 4,500 miles, taken out at 10,186
Oil has 5,686 miles on it

Copper - 175 - Think this is due to break in?
Iron - 73
Chromium - 2
Aluminum - 9
Lead - 17

Moly - 132
Phosphorus - 882
Zinc - 1029
Magnesium - 12
Calcium - 2091

Silicon - 18

Viscosity CST - 9.60


Thanks,
Jeff.

 

[buster]

The Silicon is high here which could be hurting wear numbers. I definitely think much of the wear metals are due to break in. The oil thinned down a bit but still a 30wt. I'd keep going and sample again in another 5k. Numbers should drop.

Doesn't this engine require a deisel oil?

 

[Al]

Did the analysis have any other information on it?? How about Potassium, %Fuel, Insolubles, Water.. There is really not enough information here to tell much. But the Copper is typically high for GM vehicles. You really need to see the next analysis to make any judgment.

I'm guessing things will be fine. I'd like to see potassium though. That's a telltale sign for coolant leaks.

 

[Bror Jace]

I feel better doing more frequent changes on a brand new vehicle, usually 2,500 miles the first three changes ... unless the factory uses a special break-in oil.

I'm convinced this sample is brimming with break-in debris and that's skewing these results. I held off past the 10,000 mile mark before I'll do a UOA.

I'd do a short duration next time, don't test, then another typical duration with the Schaeffer oil and re-test. That should give you a better idea as to what's going on here.

--- Bror Jace

 

[03HD]

quote:

---

Originally posted by Al:
Did the analysis have any other information on it?? How about Potassium, %Fuel, Insolubles, Water.. There is really not enough information here to tell much. But the Copper is typically high for GM vehicles. You really need to see the next analysis to make any judgment.

I'm guessing things will be fine. I'd like to see potassium though. That's a telltale sign for coolant leaks.

---

Potasium - 0
Sodium - 0
Fuel - 0
%Antifreeze - 0
%H2o - 0

Sulfer - 13
Oxidation - 9
Nitration - 12

 

[oilrecovery2003]

Why the 5w30? If new, I would run the 10w30.. BUt I would even go 15w40 for summer... what ya think guys?

 

[SSDude]

The silicon is not high. Schaeffers use high silicon as an anti-foaming agent. It has 6ppm silicon. The high copper is also normal for a GM engine. On my first analysis with Redline, with 16,000 miles on the car the copper was 181.

[ March 14, 2004, 02:25 AM: Message edited by: SSDude ]

 

[sbc350gearhead]

quote:

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Originally posted by oilrecovery2003:
Why the 5w30? If new, I would run the 10w30.. BUt I would even go 15w40 for summer... what ya think guys?

---

I wouldn't want a 10w30.......in my engine, during a minnesota winter.

 

[Whimsey]

quote:

---

Originally posted by SSDude:
The silicon is not high. Schaeffers use high silicon as an anti-foaming agent. It has 6ppm silicon. The high copper is also normal for a GM engine. On my first analysis with Redline, with 16,000 miles on the car the copper was 181.

---

Your comment about Schaeffer's silcon reading being 6 ppm silicon from the bottle makes makes sense. My first use of Schaeffer's Blend 5W-30 had a higher silicon reading of 6 ppm greater than the previous Motorcraft 5W-30, 20 ppm vs 14 ppm. Other than a new Motorcraft a/f there was no intake system difference. All the connections are tight.

Whimsey

 

[Al]

quote:

---

Originally posted by sbc350gearhead:

quote:

---

Originally posted by oilrecovery2003:
Why the 5w30? If new, I would run the 10w30.. BUt I would even go 15w40 for summer... what ya think guys?

---

I wouldn't want a 10w30.......in my engine, during a minnesota winter.

---

Exactly

 

[MNgopher]

I've seen a couple of UOA's out of the 6.0 and they are not what I would call a clean engine. Of course, that has no relation to durability as we've seen out of many examples, like the Jeep 4.0l engines. Its just a signature wear pattern.

Nothing I see in this UOA would freak me out. The engine is relatively new and other numbers I've seen have been in the same ballpark.

A few more UOA's would confirm a trend to start drawing some deeper conclusions.

5w30 is the appropriate oil choice for this climate - especially through the winter months! This is one area of the country where even the most die hard 10w30 proponents will agree a 5w30 or 0w30 makes much more sense in the winter!