SULPHATED ASH

Sulphated Ash forming deposits are considered to be undesirable contaminants and impurities in the oil. Hence low sulphated ash content oils are required to provide an effective protection against the wear in any system. High sulphated ash content in the oil will cause deposits in the combustion chamber with resultant spark plug clogging which in turn will cause engine misfire and knocking. High sulphated ash content in the system can cause clogging of the filter, block the fine pores of the filters, causing loss of power and exhaust back pressure.

ATLAS LAB tests Sulphated Ash in their laboratory by using the following test methods :

METHOD	DESCRIPTION
ASTM D874	Standard Test Method for Sulphated Ash from Lubricating Oils and Additives
IP 163	Determination of Sulphated Ash in Lubricating Oils and Additives
ISO 3987 : 1994	Petroleum products — Determination of ash in Lubricating Oils and Additives
IS 1448-4	Methods of test for Sulphated Ash in petroleum and its products

Test apparatus / equipment used for testing of Sulphated Ash :

MUFFLE FURNACE