Petroleum Quality Institute of America

The mission of the Petroleum Quality Institute of America  is to educate and serve consumers of commercial, consumer, and industrial lubricants by monitoring and reporting on the quality of lubricants in the marketplace.  

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Element Range (mg/kg) Reproducibility (μg/g)
 Aluminum   640  3.8 X0.26 
 Barium   0.54  0.59 X0.92 
 Boron   430  13 X0.01 
 Calcium   409000  0.015 X1.3 
 Chromium   140  0.81 X0.61 
 Copper   2160  0.24 X 
 Iron   2140  0.52 X0.80 
 Lead   10160  3.0 X0.36 
 Magnesium   51700  0.72 X0.77 
 Manganese   5700  0.13 X1.2 
 Molybdenum   5200  0.64 X0.71 
 Nickel   540  1.5 X0.50 
 Phosphorus   101000  4.3 X0.50 
 Potassium   401200  6.6 X0.29 
 Silicon   850  2.9 X0.39 
 Silver   0.550 0.35 X 
 Sodium   770  1.1 X0.71 
 Sulfur   9006000  1.2 X0.75 
 Tin   1040  2.1 X0.62 
 Titanium   540  2.5 X0.47 
 Vanadium   150  0.28 X1.1 
 Zinc   601600  0.083 X1.1 
   
X = mean concentration, μg/g.
mg/kg = μg/g = ppm  

For details on ASTM D5185 test method click here.

 

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