Magnesium?

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211
Location
Rome, Ga
In some of the older post there was some discussion that magnesium in the oil caused an abrasive deposit and the calcium was non abrasive. Is that a rumor or what? It is evident that Castrol must not think so or would they have removed some ca and added mag? Just wondering GregH
 

JAG

Messages
5,320
Location
Fredericksburg, VA
I've been pondering same thing for same reason (Gold GC has more Mg and less Ca than Green version), so searched and read about 8 threads about Magnesium. I found that Mg additives of the past were different than they are in newer oils. I think this quote by MoleKule sums it up best: "There are also different Magnesium sulfinate and phenate formulations, and the latest formulations present no problems. Like ZDDP, it still a low-cost cost and tried-and-true compound for most oils." Plus, I think the fact that some top notch oils use a sizable amount of magnesium compounds (NOT Mg atoms) speaks very highly of them.
 
Messages
80
Location
Tx
VOA of Green. Mg228 Na 14 B 0 VOA of Gold. Mg620 Na 3 B 2 Amsoil 5-30 Mg 17 Na 4 B426 Its in both . More interesting is the Fe 3 in Virgin oil. Green or gold. Why ?
 
Messages
3,478
Location
Millbrae, CA
"More interesting is the Fe 3 in Virgin oil. Green or gold. Why ? " 1.Rust from tanks, pipes, pumps used in transfer of additives and base stock. 2.Iorn wear particles from pumps and transfer equipment. 3. Lab error ALL spectro or IR lab numbers are Plus/Minus a small amount. 4.Trace amount of something in additives or obase oil non intended but there. 5.Additive reaction with steel tanks or pipes. bruce
 
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