Abstract: The invention provides a lubricating oil composition being a lubricating oil composition containing a base oil composition which includes a lubricant base oil belonging to Group 3 of the base oil categories specified by the American Petroleum Institute (API) and a comb-like polymethacrylate-based viscosity index improver wherein the weight-halving temperature is not less than 310° C., and the sulphur content in the aforementioned lubricating oil composition is not more than 0.3 weight % in terms of the total weight of the aforementioned lubricating oil composition, and the aforementioned lubricating oil composition has an SAE viscosity grade of 0W-20, 5W-20 or 5W-30, a viscosity index of not less than 185 and a high-temperature high-shear viscosity at 100° C. of not more than 7.5 mPa·s.

Abstract: The invention provides a lubricating oil composition for diesel engines which contains a GTL base oil with a kinematic viscosity at 100° C. of 4.5 to 5.5 mm2/s, a comblike PMA (polymethacrylate) based viscosity index improver and a boron-containing dispersant and/or boron-containing detergent, the total content of the boron-containing dispersant and/or boron-containing detergent in terms of conversion to boron content relative to the total amount of the composition being not less than 0.025 mass %, and which satisfies 0W-30 or 5W-30 in the SAE J300 standard.

Abstract: The invention provides a lubricating oil composition for internal combustion engines, containing a base oil composition containing a GTL base oil as a main component, and having % Cn of 14 to 25% and an aniline point of 120 to 126° C., and a comb-like polymethacrylate based viscosity index improver having a weight average molecular weight (Mw) of 400,000 or more, wherein a N sulfur content is 0.3 mass % or less based on a total weight of the lubricating oil composition.

Abstract: A lubricating oil composition comprising a GTL (Gas to-Liquid) base oil synthesized by the Fischer-Tropsch process and a viscosity index improver, wherein the content of the viscosity index improver is 0.1 to 20 mass %, and at least HTHSV 50° C./HTHSV 150° C. is 6.50 or less and KV 50° C./HTHSV 150° C. is 8.00 or less.

Abstract: A lubricating oil composition for internal combustion engines is disclosed. The composition exhibits a lower coefficient of friction and improved cleaning properties without causing a deterioration in thermal and oxidation stability.

Abstract: The invention provides a lubricating oil composition being a lubricating oil composition containing a base oil composition which includes a lubricant base oil belonging to Group 3 of the base oil categories specified by the American Petroleum Institute (API) and a comb-like polymethacrylate-based viscosity index improver wherein the weight-halving temperature is not less than 310° C., and the sulphur content in the aforementioned lubricating oil composition is not more than 0.3 weight % in terms of the total weight of the aforementioned lubricating oil composition, and the aforementioned lubricating oil composition has an SAE viscosity grade of 0W-20, 5W-20 or 5W-30, a viscosity index of not less than 185 and a high-temperature high-shear viscosity at 100° C. of not more than 7.5 mPa·s.

Abstract: To provide a lubricating oil composition for internal combustion engines, which can realize low friction in both internal combustion engines equipped with a DLC and internal combustion engines not equipped with a DLC. [Solution] a lubricating oil composition for internal combustion engines, which is characterized in that the lubricating oil composition for internal combustion engines is a composition obtained by blending a molybdenum dithiocarbamate (MoDTC) and a polyalkylene glycol (PAG) in a base oil, the weight average molecular weight of the polyalkylene glycol is 2750-4500 and the content of the polyalkylene glycol is not less than 0.05 mass % and less than 10 mass % relative to the total mass of the composition.

Abstract: A lubricating oil composition for internal combustion engines containing a base oil mixture with specific properties and a monoglyceride with a specific structure. The lubricating oil composition of the present 5 invention, as well as providing outstanding wear resistance and fuel economy, causes condensed water etc. from water vapor produced as a result of fuel combustion to be dispersed in the oil, so preventing corrosion or rusting of the engine.

Abstract: The present invention provides a low-friction sliding mechanism comprising a lubricant composition on a sliding plane between a DLC-coated sliding member (A) and a sliding member (B), wherein the DLC-coated sliding member (A) is formed by coating a base material with diamond-like-carbon containing 10 atom % or less of hydrogen, the sliding member (B) includes at least one kind of material selected from the group consisting of a metal material, a non-metal material, and a metal or non-metal coated material having a surface coated with a thin film, and the lubricant composition contains a basic oil (C), PAG (D), and an acid oxygen-containing organic compound (E) with an acid number of more than 1 mgKOH/g.

Abstract: A lubricating oil composition for internal combustion engines is disclosed. The composition exhibits a lower coefficient of friction and improved cleaning properties without causing a deterioration in thermal and oxidation stability.

Abstract: A lubricating oil composition comprising (A) a lubricating oil base oil the kinematic viscosity of which at 100° C. is in the range of from 1.4 to 6 mm2/s, (B) from 250 to 2000 ppm in terms of molybdenum of a molybdenum dialkyldithiocarbamate, (C) from 20 to 500 ppm in terms of sulphur of tetrabenzyl thiuram disulphide and (D) from 0.05 to 3.0 mass % of an amine. The lubricating oil composition of the present invention has a superior friction reducing effect and which has a superior fuel economy effect.

Abstract: A lubricating oil additive comprising an organic molybdenum compound represented by general formula (1) below: wherein in formula (1), R1 denotes a straight chain or branched chain alkyl group represented by the general formula CnH2n+1 (n is a positive integer) or a cyclohexyl group, R2 denotes a methyl group or an ethyl group, and R1 and R2 are different. The lubricating oil additive is suitable for use as a friction modifier in a lubricating composition and is able to adjust frictional properties to a suitable level.

Abstract: A lubricating oil additive comprising an organic molybdenum compound represented by general formula (1) below: (1) Wherein in formula (1), R1 denotes a straight chain or branched chain alkyl group represented by the general formula CnH2n+1 (n is a positive integer) or a cyclohexyl group, R2 denotes a methyl group or an ethyl group, and R1 and R2 are different. The lubricating oil additive is able to adjust frictional properties to a suitable level.

Abstract: A lubricating oil composition for internal combustion engines containing a base oil mixture with specific properties and a monoglyceride with a specific structure. The lubricating oil composition of the present 5 invention, as well as providing outstanding wear resistance and fuel economy, causes condensed water etc. from water vapour produced as a result of fuel combustion to be dispersed in the oil, so preventing corrosion or rusting of the engine.

Abstract: A lubricating oil composition for internal combustion engines containing a specific base oil, monoglyceride with a specific structure and ethylene oxide adduct with a specific structure in specific quantities and/or ratios. The lubricating oil composition of the present invention, as well as providing outstanding wear resistance and fuel economy, causes condensed water etc. from water vapour produced as a result of fuel combustion to be dispersed in the oil, so preventing corrosion or rusting of the engine.

Abstract: Method for the identification of a lubricating oil composition, characterised in that it comprises the following steps: a heating process to heat the lubricating oil composition which is the target of the investigation and which has the possibility of containing a volatile amine as a marker; after the heating process, a first reaction process which disposes into a vapour phase on top of the liquid surface of the lubricating oil composition a medium which contains an amine colouring reagent to be used in at least one kind of amine-based colouring reaction selected from a group comprised of quinhydrone reactions, ninhydrin reactions and Dragendorff reactions; after the heating process, a second reaction process which disposes into a vapour phase on top of the liquid surface of the lubricating oil composition a medium which contains a pH-dependent colouring reagent to be used in a pH-dependent colouring reaction; and an evaluation process in which the lubricating oil composition which is the target of the invest

Abstract: A lubricating oil for an internal combustion engine is disclosed. The lubricating oil can provide reduced friction and can cope with environmental regulations requiring a high corrosion-preventing effect. The lubricating oil composition contains a mono or diester of glycerin and a straight-chain or branched fatty acid of C6 to 20 having a saturated hydrocarbyl group; a triazole derivative; and a mixture of primary zinc dialkyl dithiophosphate and secondary zinc dialkyl dithiophosphate.

Abstract: Lubricating oil composition for use in diesel engines which comprises, in the base oil, not more than 0.3% by mass of sulphated ash, from 0.01 to 0.2% by mass of nitrogen in succinimides, from 0.05 to 0.12% by mass of zinc in zinc dithiophosphates, from 0.02 to 0.3% by mass of nitrogen in amine-based anti-oxidants, and from 0.01 to 0.08% by mass of boron, which further has a total value of [(zinc amount in zinc dithiophosphates)×(nitrogen amount in succinimides)] and [(zinc amount in zinc dithiophosphates)×(nitrogen amount in amine-based anti-oxidants)] as regards the aforementioned of from 0.015 to 0.06, and which does not contain salicylate, phenate or sulphonate metallic detergents. The intention is to obtain a lubricating oil composition for use in diesel engines which does not contain a metallic detergent yet maintains excellent engine (piston) detergency while preventing DPF clogging, and which reduces valve-train wear.

Abstract: A lubricating oil composition comprising (I) 100 pbw of a base oil, (II) an antiwear agent comprising (i) from 0.05 to 10 pbw of a phosphorothionate and from 0.01 to 1.0 pbw of an amine salt of phosphorus compound and/or (ii) from 0.05 to 10 pbw of a dithiophosphate, and (III) a rust preventing agent comprising from 0.01 to 1.0 pbw of an amide obtained by reacting a polyalkylene polyamine and a carboxylic acid having from 4 to 30 carbon atoms, and the use of such lubricating composition.