Sodium and coolant leak?

[Silverado]

At what levels of sodium in a UOA would one determine a coolant leak? I just had a UOA with 15 ppm sodium. The oil being used is Castrol Syntec 10w-40 which doesn't show any sodium in its virgin oil analysis. Should I be alarmed?

 

[benjamming]

Please post the entire UOA in the Used Oil Analysis Section. Was there lots of other wear? Did viscosity go out of whack?

 

[Silverado]

UOA is posted,(383 stroker w/ 10w-40 Syntec) but havent had any comments on the how severe the sodium is.

 

[Motorbike]

Sodium can be used as a detergent/dispersant additive . If the lab don't look for it in a VOA it would be difficult to tell how much if any was initially used .

Here are some other odd additives . Lead , copper and barium . Oh the future is bright . Exiting times for new engine oil formulas

Barium (Ba) Detergent or dispersant additive
Boron (B) Extreme-pressure additive
Calcium (Ca) Detergent or dispersant additive
Copper (Cu) Anti-wear additive
Lead (Pb) Anti-wear additive
Magnesium (Mg) Detergent or dispersant additive
Molybdenum (Mo) Friction modifier
Phosphorus (P) Corrosion inhibitor, anit-wear additive
Silicon (Si) Anti-foaming additive
Sodium (Na) Detergent or dispersant additive
Zinc (Zn) Anti-wear or anti-oxidant additive

 

[Silverado]

What I'm looking for is at what levels of sodium should I start to worry? My sodium levels have gone from 5 to 10 to 15 on my UOA's. When would one start to be suspicious of a coolant leak?