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.

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.

Provided is a mold release agent composition containing a polymer ester, the composition exerting a good mold releasability even when the temperature of mold increases, and a die casting method using the composition.

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.

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.

A lubricating oil additive composition comprising at least one organomolybdenum compound and at least one 2,5-dimercapto-1,3,4-thiadiazole alkyl polycarboxylate compound.

The instant disclosure generally relates to lubricating compositions having an oil of lubricating viscosity, a mixture of boron-containing and boron-free dispersants, an overbased magnesium-based detergent, an overbased calcium-based detergent, an ashless friction modifier, and, optionally, other performance additives. The instant lubricating compositions may improve one or more of cleanliness, TBN retention, fuel economy and low-speed preignition (“LSPI”).

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.

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.

The instant disclosure generally relates to lubricating compositions having an oil of lubricating viscosity, a mixture of boron-containing and boron-free dispersants, an overbased magnesium-based detergent, an overbased calcium-based detergent, a molybdenum-containing material, and, optionally, other performance additives. The instant lubricating compositions may improve one or more of cleanliness, TBN retention, fuel economy and low-speed preignition (“LSPI”).