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Re: 2006 Silverado 4.8 UOA Peak 5w30 [Re: bigmike] #5284746 12/04/19 09:03 AM
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RDY4WAR Online Content
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I also wouldn't put MoS2 in any of my vehicles, but not because of fear of sulfur. The oil I have in my 2002 Tahoe 5.3L is 1.85% sulfated ash (>3x the API limit) and my copper wear at 10k mile OCI is <20 ppm. There's a difference between active and inactive sulfur. Active sulfur is corrosive to yellow metals, but inactive is not. MoS2 is not active sulfur. Neither is ZDDP, MoDTC, or any other commonly used sulfur-containing engine oil additive. An example of active sulfur is like olefin sulfide which is used in greases, gear oils, and metalworking oils. Olefin sulfides, along with tackifiers like sulfurized polyisobutylenes, are why some gear oils, MTLs, and greases have that distinctive sulfur smell.

I'd also like to note that the metal shown here is realistically about 20% higher than what is shown there. Blackstone is pretty notorious for reading low. I communicate with several blenders and formulators, all of which conduct periodic quality checks on their batches, and none of them use Blackstone for that reason.

Last edited by RDY4WAR; 12/04/19 09:11 AM.

"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: 2006 Silverado 4.8 UOA Peak 5w30 [Re: bigmike] #5285211 12/04/19 05:53 PM
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bigmike Offline OP
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Thank you for this explanation. It is appreciated.


Take care,
-Mike

2006 Chevy Silverado LT 4.8 - Maxxlife 5w30, Purolator One
2009 Honda Accord LX-P 2.4 - Penn Ultra 0w20, Purolator Classic
Re: 2006 Silverado 4.8 UOA Peak 5w30 [Re: RDY4WAR] #5285244 12/04/19 06:20 PM
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dave1251 Offline
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Originally Posted by RDY4WAR
I also wouldn't put MoS2 in any of my vehicles, but not because of fear of sulfur. The oil I have in my 2002 Tahoe 5.3L is 1.85% sulfated ash (>3x the API limit) and my copper wear at 10k mile OCI is <20 ppm. There's a difference between active and inactive sulfur. Active sulfur is corrosive to yellow metals, but inactive is not. MoS2 is not active sulfur. Neither is ZDDP, MoDTC, or any other commonly used sulfur-containing engine oil additive. An example of active sulfur is like olefin sulfide which is used in greases, gear oils, and metalworking oils. Olefin sulfides, along with tackifiers like sulfurized polyisobutylenes, are why some gear oils, MTLs, and greases have that distinctive sulfur smell.

I'd also like to note that the metal shown here is realistically about 20% higher than what is shown there. Blackstone is pretty notorious for reading low. I communicate with several blenders and formulators, all of which conduct periodic quality checks on their batches, and none of them use Blackstone for that reason.



I don't agree it's real easy to lookup and compare. There can be up to around 10% variance between Wearcheck Blackstone, WIX, CAT. Not 20% you have a habit of writing well written and thoughtful posts often there is a tidbit of inaccurate information.


make the inside of your engine oil cap white.
don't use.
Re: 2006 Silverado 4.8 UOA Peak 5w30 [Re: bigmike] #5285270 12/04/19 06:44 PM
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Well, I guess the bottom line for me is, I know I'm not looking at a cracked head and that was a huge relief for me when I received this report. I'll keep an eye on the coolant and see if the new cap has fixed my issues.

I'll skip the MOS2 moving forward. I took the time to read through the forums on the subject. Trav's thread about it collecting in the pan really changed my mind on the product.

I have probably 50 quarts of all kinds of brands of oil in 5w30, so I'll retest and see what's happening with the copper. Current fill is Maxlife. I don't put allot of miles on it, so was doing yearly oil changes until this issue came up. I think I'll go to changing every 6 months until I know more.

Anything I'm missing here?

Thanks for the comments!


Take care,
-Mike

2006 Chevy Silverado LT 4.8 - Maxxlife 5w30, Purolator One
2009 Honda Accord LX-P 2.4 - Penn Ultra 0w20, Purolator Classic
Re: 2006 Silverado 4.8 UOA Peak 5w30 [Re: dave1251] #5285397 12/04/19 09:32 PM
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RDY4WAR Online Content
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Originally Posted by dave1251
Originally Posted by RDY4WAR
I also wouldn't put MoS2 in any of my vehicles, but not because of fear of sulfur. The oil I have in my 2002 Tahoe 5.3L is 1.85% sulfated ash (>3x the API limit) and my copper wear at 10k mile OCI is <20 ppm. There's a difference between active and inactive sulfur. Active sulfur is corrosive to yellow metals, but inactive is not. MoS2 is not active sulfur. Neither is ZDDP, MoDTC, or any other commonly used sulfur-containing engine oil additive. An example of active sulfur is like olefin sulfide which is used in greases, gear oils, and metalworking oils. Olefin sulfides, along with tackifiers like sulfurized polyisobutylenes, are why some gear oils, MTLs, and greases have that distinctive sulfur smell.

I'd also like to note that the metal shown here is realistically about 20% higher than what is shown there. Blackstone is pretty notorious for reading low. I communicate with several blenders and formulators, all of which conduct periodic quality checks on their batches, and none of them use Blackstone for that reason.



I don't agree it's real easy to lookup and compare. There can be up to around 10% variance between Wearcheck Blackstone, WIX, CAT. Not 20% you have a habit of writing well written and thoughtful posts often there is a tidbit of inaccurate information.


I'm not talking about the10% margin of error. I'm talking about Blackstone commonly being down 20% compared to everywhere else.

For example, here's PQIA's results of this same oil.

http://www.pqiadata.org/Peak5W30.html


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: 2006 Silverado 4.8 UOA Peak 5w30 [Re: RDY4WAR] #5285540 12/05/19 03:43 AM
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Originally Posted by RDY4WAR
Originally Posted by dave1251
Originally Posted by RDY4WAR
I also wouldn't put MoS2 in any of my vehicles, but not because of fear of sulfur. The oil I have in my 2002 Tahoe 5.3L is 1.85% sulfated ash (>3x the API limit) and my copper wear at 10k mile OCI is <20 ppm. There's a difference between active and inactive sulfur. Active sulfur is corrosive to yellow metals, but inactive is not. MoS2 is not active sulfur. Neither is ZDDP, MoDTC, or any other commonly used sulfur-containing engine oil additive. An example of active sulfur is like olefin sulfide which is used in greases, gear oils, and metalworking oils. Olefin sulfides, along with tackifiers like sulfurized polyisobutylenes, are why some gear oils, MTLs, and greases have that distinctive sulfur smell.

I'd also like to note that the metal shown here is realistically about 20% higher than what is shown there. Blackstone is pretty notorious for reading low. I communicate with several blenders and formulators, all of which conduct periodic quality checks on their batches, and none of them use Blackstone for that reason.



I don't agree it's real easy to lookup and compare. There can be up to around 10% variance between Wearcheck Blackstone, WIX, CAT. Not 20% you have a habit of writing well written and thoughtful posts often there is a tidbit of inaccurate information.


I'm not talking about the10% margin of error. I'm talking about Blackstone commonly being down 20% compared to everywhere else.

For example, here's PQIA's results of this same oil.

http://www.pqiadata.org/Peak5W30.html



Likely different batches thus this comparison is invalid. Also I did not state margin of error I stated variance.


Variance= the fact or quality of being different, divergent, or inconsistent.

Margin of error= amount that is allowed for in case of miscalculation or change of circumstance.

Take a sample and send it to 4 labs and all 4 will have different interpretations. Plus "blenders" don't have access to their own test equipment and data. The "blender" needs to rely on a 3rd party for a QC check on a product which could already be in use. That has disaster waiting to happen all over it.


make the inside of your engine oil cap white.
don't use.
Re: 2006 Silverado 4.8 UOA Peak 5w30 [Re: dave1251] #5285708 12/05/19 08:42 AM
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Originally Posted by dave1251



Likely different batches thus this comparison is invalid. Also I did not state margin of error I stated variance.


Variance= the fact or quality of being different, divergent, or inconsistent.

Margin of error= amount that is allowed for in case of miscalculation or change of circumstance.

Take a sample and send it to 4 labs and all 4 will have different interpretations. Plus "blenders" don't have access to their own test equipment and data. The "blender" needs to rely on a 3rd party for a QC check on a product which could already be in use. That has disaster waiting to happen all over it.


Yes, most blenders use 3rd party for QC, but not all. High Performance Lubricants, for example, has all of their test equipment in house with retain of every batch they produce.

I don't feel like there's that much variance from one batch to another. This isn't a single event. Blackstone has been repeatedly lower than other labs.

Another example from just earlier this year.

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/5172640/jgr-driven-ls-30-5w-30

Driven does QC on every batch and it never varies more than 5%. They are very strict about that.

Here's another absurd Blackstone report vs PQIA. Batches don't vary that much.

https://s225.photobucket.com/user/btanchors/media/Mobil1_AP_zpsbicytlpv.png.html

http://www.pqiadata.org/Mobil1_Annual_Protection_5W30.html

There's plenty of other examples of Blackstone numbers coming out low. Many of them show P levels below the API 600 ppm limit which we know isn't accurate for an API SN/SN+ rated oil. They wouldn't get the starburst if it was.

Last edited by RDY4WAR; 12/05/19 08:44 AM.

"He who is without oil, shall throw the first rod." - Compressions 9:1
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