A lubricating oil composition, containing a base oil (A), a metal-based detergent (B), and a molybdenum compound (D), the lubricating oil composition having a content of molybdenum atoms derived from the molybdenum compound (D) of 0.05% by mass or more, a base number of 4.0 mg KOH/g or more, and an HTHS viscosity at 150° C. of 1.3 mPa.Math.s or more and less than 2.3 mPa.Math.s.

This disclosure describes lubricating additives and lubricants including such additives suitable for and/or configured for mixed fleet use and, for instance, additives and lubricants that satisfy performance standards for typical spark ignition passenger car lubricants as well as performance standards for lubricants suitable for typical compression ignition heavy duty engine applications.

A crankcase lubricating oil composition for the crankcase of a spark-ignited or compression-ignited internal combustion engine, comprising a magnesium-containing detergent, in an amount sufficient to provide from 200-4000 ppm magnesium to the lubricating oil composition, in combination with an oil-soluble or oil-dispersible molybdenum compound in an amount sufficient to provide from 600-1500 ppm molybdenum atoms to the lubricating oil composition, and with an oil-soluble or oil-dispersible boron-containing compound in an amount sufficient to provide from 200-600 ppm boron atoms to the lubricating oil composition to improve the friction and fuel economy performance.

This invention relates to the use of a metallic or non-metallic detergent which is a hydrocarbyl-substituted salicylic acid or a derivative thereof in a non-aqueous lubricant composition as an inhibitor of lead corrosion associated with ashless, organic ester, anti-wear additives and/or friction modifiers.

This disclosure describes blends of detergent and antiwear lubricating additives and lubricants including such additive blends effective to reduce high-temperature deposits, and in particular, high-temperature deposits in low ash compositions.

A lubricant composition comprising, in relation to the total weight of the lubricant composition:

at least one base oil;

0.005 to 10% by weight of at least one polymeric organic friction modifier; and

0.005 to 10% by weight of at least one ester, said polymeric organic friction modifier being the reaction product of: a) at least one hydrophobic polymer subunit which comprises a hydrophobic polymer selected from polyolefins, polyacrylics and polystyrenes; b) at least one hydrophilic polymer subunit which comprises a hydrophilic polymer selected from polyethers, polyesters and polyamides; c) optionally at least one backbone moiety capable of linking polymeric subunits together; and d) optionally a chain termination group.

A lubricant composition comprising, in relation to the total weight of the lubricant composition:

at least one base oil;

0.005 to 10% by weight of at least one polymeric organic friction modifier; and

0.005 to 10% by weight of at least one ester, said polymeric organic friction modifier being the reaction product of: a) at least one hydrophobic polymer subunit which comprises a hydrophobic polymer selected from polyolefins, polyacrylics and polystyrenes; b) at least one hydrophilic polymer subunit which comprises a hydrophilic polymer selected from polyethers, polyesters and polyamides; c) optionally at least one backbone moiety capable of linking polymeric subunits together; and d) optionally a chain termination group.

The addition of mixed thio acid amide molybdenum dithiocarbamates to lubricant compositions comprising magnesium detergents and/or overbased magnesium detergents, e.g., overbased magnesium sulfonate, provides lubricant compositions that suppress Low Speed Pre-Ignition and possess excellent low friction characteristics. Furthermore, the addition of molybdenum based friction reducing additives, e.g., mixed thio acid amide molybdenum dithiocarbamates, in combination with one or more fatty acid 2-hydroxyalkylamides, to lubricant compositions comprising magnesium detergents or overbased magnesium detergents provides lubricant compositions that suppress Low Speed Pre-ignition and possess excellent low friction characteristics.

A lubricant for marine engine, notably for a two-stroke marine engine. More particularly, a lubricant for a marine engine including at least one lubricant base oil and at least one di-alkylaminopolyalkylamine.

Lubricating oil composition is provided. The composition includes several components including a base oil, a primary antioxidant including alkylated diphenylamines having an alkyl group derived from a propylene tetramer; and a sulfonate detergent.