Amsoil 10W30 ATM, 9247 miles, 2003 Silverado 1500HD

[Mort]

Hi,
This is my first UOA (First ever as well) on my Chevrolet Silverado 1500HD with the 6.0L. I used Amsoil 10W30 ATM and went the distance indicated by the GM Oil Life Monitoring System. The test was completed by Fluid Life from Edmonton, Alberta. I changed the oil at this interval and added Amsoil 5W30 ATM. I had 32928Km (20580 miles) on the truck and 14795Km (9247 miles) on the oil. Here are the results: New Oil ; Used Oil
Silicon 7 9
Sodium 1 0
Potassium 1 0
Iron 0 20
Chrome 0 1
Lead 0 3
Copper 1 66
Tin 0 0
Aluminum 2 4
Nickel 0 1
Silver 0 0
Titanium 0 1
Boron 3 35
Phosphorus 1220 935
Zinc 1461 1141
Calcium 1929 2179
Barium 35 0
Magnesium 743 692
Molybdenum 0 11
Vanadium 1 0
Antimony 0 0
Lithium 0 2
Beryllium - 0
Water - N
Glycol Not Tested
Visc-40*C - 84.7R
Visc-100*C - 13.87R
Fuel Not Tested
Solids Not Tested
TBN(mgKOH/g)9.50 9.48

The New Oil figures are ones that Fluid Life have on file for this oil. I don't really understand the viscosity figures but it looks like this oil rates as a straight 40 weight. It looks like this oil could have gone a lot farther but is heavier than advertised. It looks like they mixed up the Boron and Barium to me???? These Chev engines seem to have a lot of copper in them somewhere?

What do you think?

Thanks Jim

 

[benjamming]

How in the heck do you have the same TBN after almost 10k miles? That's the biggest thing that jumps out to me.

 

[unDummy]

Better contact them to double check for any typos.
Another amsoil thickening to a 40wt. Maybe not an issue during the summer, but I wonder what the cold starts would be like. Glad to see you switched to the 5w.
Otherwise a good run with Amsoil and typical copper wear with SBCs.

 

[Al]

quote:

---

Originally posted by unDummy:
Better contact them to double check for any typos.
Another amsoil thickening to a 40wt. Maybe not an issue during the summer, but I wonder what the cold starts would be like. Glad to see you switched to the 5w.
Otherwise a good run with Amsoil and typical copper wear with SBCs.

---

Roger the typos. Have them check all the numbers against the origional report. These things happen.

I also agree with unDummy for what its worth.

 

[T-Keith]

2ppm silicon, that should be good air filtration.

32ppm Barium, where's that coming from?

 

[T-Keith]

I actually meant Boron. You gained 32ppm of Boron in the UOA.

-T

 

[Ken2]

Mort,
GM's oil life monitor is a system that keeps track of the number of starts, slow running, fast running, hard running, etc., and estimates the life remaining in conventional oil. It does not actually measure anything in the oil itself.

Your synthetic oil is good for much longer than that indicated by the oil life monitor. The oil analyses (if done correctly and interpreted correctly) are your best guide.


Ken

 

[Mort]

Thank you all for your replies.

Benjamming - all I can say is these SBCs must not generate much in the way of acid contamination in the oil. Good rings? Tight piston clearances?

unDummy - I too was wondering about the oil thickening. Do you think the 5W30 will do the same? Time will tell. The oil pressure guage seems to run higher than it did with GM dino 10W30. I will check the typos out. I think it should be Boron 35 and Barium 3 in the VOA.

Al - Yup we are all human.

T-Keith - I am running the stock filter which in my truck is some kind of a high capacity filter. Barium is zero and the figure in the VOA is a typo error as far as I can figure.

Thanks again, Jim