Petroleum products — Determination of sulfated ash in lubricating oils and additives
Oct 29, 2010
90.92Standard to be revisedMay 4, 2023
Petroleum and related products, fuels and lubricants from natural or synthetic sources
Lubricants, industrial oils and related products
ISO 3987:2010 describes a procedure for the determination of the mass percentage of sulfated ash from unused lubricating oils containing additives and from additive concentrates used in compounding. These additives usually contain one or more of the following metals: barium, calcium, magnesium, zinc, potassium, sodium and tin. The elements sulfur, phosphorus and chlorine can also be present in combined form.