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Barium #4111727 05/31/16 07:25 PM
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Hullthumper Offline OP
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Ok, question for you tribologist out there. I use Cenpeco S3 30 Wt in my boat's diesel engine and I have had very good service with it according to Blackstone. Low wear metals and high TBN retention strong Calcium and Zinc content, but it is the only UAO's I have seen with Barium of any amount in it (usually in 80's). It is my understandings Barium is used as a detergent. Any other use and why do you suppose they seem to be the only one using it?


80 Cape Dory - Cenpeco S3 SAE 30
Suzuki outboard - Brad Penn V2 10W40
16 Nissan Frontier - LE Tetra syn 5w30
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Re: Barium [Re: Hullthumper] #4111898 05/31/16 11:26 PM
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MolaKule Offline
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Interesting, since Barium is a heavy metal and has been removed from most engine oils.

Barium is a multi-functional agent and is used as a Corrosion Inhibitor, Rust Inhibitor, Demulsifier, and soot disperser.

It usually comes in a chemical form known as barium dinonylnaphthalene sulfonate.


Last edited by MolaKule; 05/31/16 11:28 PM.

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Re: Barium [Re: Hullthumper] #4112033 06/01/16 04:43 AM
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weasley Offline
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My first response to Ba in oil is a coolant leak.


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Re: Barium [Re: Hullthumper] #4115807 06/05/16 12:58 PM
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Hullthumper Offline OP
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No coolant leak. Interesting rust preventative. When I talked to their engineer, one of the reasons he suggested the S3 for my application was because it met a military sailtwater spec. He said several of their oils do because they make oils for obsolete equipment many of which are antiques and are not used a lot and need to be protected from corrosion.


80 Cape Dory - Cenpeco S3 SAE 30
Suzuki outboard - Brad Penn V2 10W40
16 Nissan Frontier - LE Tetra syn 5w30
15 Dodge Journey - PYB & Mopar filter
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