Bl. This standard establishes the method of determining the ash content in petroleum products. B-2 When this method is applied to mineral oils used in motors, leaded products, and new and used oils containing organometallic additives, large portions of metal are lost through evaporation. In these cases, the ash content is not a measure of the inorganic contaminating materials or the organometallic compounds in the oil, which is why this method is not recommended for use in these oils.
IRAM 6564-1954 history
1954IRAM 6564-1954 How to determine the gray matter content in petroleum products