Disclosed herein are marine diesel cylinder lubricating oil compositions which comprises (a) a major amount of an oil of lubricating viscosity, and (b) one or more non-borated polyalkenyl bis-succinimide dispersants, wherein the polyalkenyl substituent is derived from a polyalkene group having a number average molecular weight of from about 1500 to about 3000; and further wherein the marine diesel cylinder lubricating oil composition has a total base number (TBN) of about 5 to about 150. Also disclosed herein are marine diesel cylinder lubricating oil compositions which comprises (a) a major amount of an oil of lubricating viscosity, and (b) one or cyclic carbonate post-treated polyalkenyl bis-succinimide dispersants, wherein the marine diesel cylinder lubricating oil composition has a total base number (TBN) of about 5 to about 150.

Disclosed herein are marine diesel cylinder lubricating oil compositions which comprises (a) a major amount of an oil of lubricating viscosity, and (b) one or more non-borated polyalkenyl bis-succinimide dispersants, wherein the polyalkenyl substituent is derived from a polyalkene group having a number average molecular weight of from about 1500 to about 3000; and further wherein the marine diesel cylinder lubricating oil composition has a total base number (TBN) of about 5 to about 150. Also disclosed herein are marine diesel cylinder lubricating oil compositions which comprises (a) a major amount of an oil of lubricating viscosity, and (b) one or cyclic carbonate post-treated polyalkenyl bis-succinimide dispersants, wherein the marine diesel cylinder lubricating oil composition has a total base number (TBN) of about 5 to about 150.

The invention is directed to a method for reducing low speed pre-ignition events in a spark-ignited direct injection internal combustion engine by supplying to the sump a lubricant composition which contains an oil of lubricating viscosity and an ashless dispersant. The ashless dispersant may be selected from succinimide compounds prepared from aliphatic or aromatic amines.

A sulphurised calcium phenate detergent is made by (i) reacting hydrogenated distlled CNSL with a calcium salt and sulphur in the presence of a promoter and process solvent; (ii) reacting the product of (i) with additional calcium salt and promoter, and with a co-surfactant, and then carbonating; and optionally (iii) further carbonating the reaction mixture to obtain overbased sulphurised calcium phenate.

An industrial lubricant composition including an oil base selected from the group consisting of vegetable oil, Group I, Group II, Group III, Group IV, Group V and combinations thereof and a phosphorus-based non-chlorine additive. The industrial lubricant also includes at least one intercalation compound of a metal chalcogenide, a carbon containing compound and a boron containing compound, wherein the intercalation compound may have a geometry that is a platelet shaped geometry, a spherical shaped geometry, a multi-layered fullerene-like geometry, a tubular-like geometry or a combination thereof.

The present disclosure provides a method for preparing a sulfurized alkyl phenate product to achieve a high sulfurization ratio of sulfurized alkyl phenate to unsulfurized alkyl phenate/phenol in the context of a neutralized and optionally overbased additive.

The present disclosure provides a method for preparing a sulfurized alkyl phenate product to achieve a high sulfurization ratio of sulfurized alkyl phenate to unsulfurized alkyl phenate/phenol in the context of a neutralized and optionally overbased additive.