Sodium?

[sparkplug]

I know some companies are using sodium in their oils as a detergent but how does is compare with calcium?

 

[sunfire]

I been wondering why for a long time too. Why do premium oils like M1, PP, and Amsoil use only trace amounts of Sodium? While other oils like Synpower,WB, and GTX is loaded with Sodium.

 

[Herz]

I am also curious too, what exactly does sodium accomplish in a oil?

 

[dickwells]

In my 2002 Chevy 4.3 it accomplished warning me that my manifold gasket was leaking antifreeze into the oil (twice).

 

[Spykem4e]

i'm going to take a guess.. they use sodium carbonate to increase the pH or sodium bisulfate to decrease the pH? Sodium bicarbonate to control the alkalinity? Sodium Thiosulfate to neutralize chlorine or bromine from previous applications?

 

[vxcalais]

I believe Sodium is added mainly to control oil pressure ???

 

[vxcalais]

Also replaces some calcium for dispersent/detergent ? Keeps the ash down.

 

[sunfire]

Bump.

 

[calvinnnnnnnnn]

does coolant contain sodium?

 

[edhackett]

Some do. Some have both Na and K, others only K. It is usually from NaOH or KOH used to raise the pH. It can also come from the additive package.

Ed

 

[buster]

Quote:
Both sodium and calcium are "soft" antiwear additives as well.

The secondary AW agent is ZDDP and helping out is boron, calcium, and sodium as primary AW agents.


As I predicted and stated two years ago, ZDDP would be phased out or reduced in lieu of other agents.

Sodium is similar and they use a sodium sulfonate or sodium naphthenesulfonate. The sodium add is multifunctional:

1. functions as a detergent
2. functions as an Anti-Wear agent
3. functions as a rust inhibitor
4. functions as the tbn reserve since it is overbased as well.
5. functions as a friction moifier.

 

[addyguy]

Didn't realize sodium performed so many functions - would seem that 'high' sodium amounts are a good thing. I had got the 'impression' from other posts that Na was a 'cheap' detergent that companies used to keep blending costs low.

 

[buster]

Quote:
I had got the 'impression' from other posts that Na was a 'cheap' detergent that companies used to keep blending costs low.


I did too. Mobil was using Na in their 5000/7500 oils a few years back.

 

[bradepb]

Doc told me to cut back on sodium , how the heck did he know I use Valvoline?