A LOW-SULFUR CONSUMABLE LUBRICATING OIL COMPOSITION AND A METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE USING THE SAME

摘要

A consumable lubricating oil composition, comprises a base oil and an acylated nitrogen-containing compound. It has a sulfur content of 5 to 250 ppm and is characterized by the absence of an extreme-pressure additive comprised of metal and phosphorus. This composition can be used for lubricating an internal combustion engine equipped with an exhaust gas aftertreatment device, by removing part of the lubricating oil composition from said engine and combining it with fuel which is consumed as the engine is operated, or combining it with the exhaust gas from the engine.