# US 8,784,642 B2 · Lubricating oil composition for lubricating automotive engines > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,642 B2 - Document ID: US8784642B2 - Status: Granted - Kind: B2 - Application number: 13/294,910 - Filed: 2011-11-11 - Published: 2012-05-31 - Granted: 2014-07-22 - Earliest claimed: 2010-11-29 - Assignees: Chevron Japan Ltd. - Applicants: Hiroki Andoh; Morikuni Nakazato - Inventors: Hiroki Andoh; Morikuni Nakazato - Web page: https://patentgrep.com/patent/US8784642B2 ## CPC - C10M 169/04: Mixtures of base-materials and additives - C10M 2203/1025: used as base material - C10M 2205/022: Ethene - C10M 2205/163: used as base material - C10M 2207/028: Overbased salts thereof - C10M 2209/084: Acrylate; Methacrylate - C10M 2215/064: Di- and triaryl amines - C10M 2215/28: Amides; Imides - C10M 2219/022: of hydrocarbons, e.g. olefines - C10M 2219/044: Sulfonic acids, Derivatives thereof, e.g. neutral salts - C10M 2223/045: Metal containing thio derivatives - C10N 2020/02: Viscosity; Viscosity index - C10N 2030/02: Pour-point; Viscosity index - C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure - C10N 2030/08: Resistance to extreme temperature - C10N 2030/52: {Base number [TBN]} - C10N 2030/54: {Fuel economy} - C10N 2030/74: {Noack Volatility} - C10N 2040/253: {Small diesel engines} - C10N 2040/255: {Gasoline engines} - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## Abstract A lubricating oil composition of SAE viscosity grade 0W20 which comprises a base oil and additive components comprising a nitrogen-containing ashless dispersant, an alkaline earth metal-containing detergent, a phosphorus-containing wear inhibitor, an oxidation inhibitor and a viscosity index improver and which shows a viscosity index of 200-240, a HTHS viscosity of not less than 2.9 mPa·s s at 150° C. and a Noack evaporation loss of not more than 13% favorably gives a high fuel economy and high wear inhibition to a four cycle gasoline engine of motorcycles and a diesel engine mounted on motor cars equipped with an exhaust gas post-processing apparatus. ## Claims ### Claim 1 A lubricating oil composition having an SAE viscosity grade of 0W20 and having a kinematic viscosity at 100° C. of no less than 8.5 mm2/s and no greater than 9.3 mm2/s, a viscosity index in the range of 200 to 240, a high temperature-high shear viscosity of not less than 2.9 mPa·s at 150° C. and a Noack evaporation loss of not more than 13% for lubricating automotive engines wherein said lubricating oil composition comprises a base oil containing not less than 80 wt. % of a mineral base oil showing a kinematic viscosity in the range of 2 to 9 mm2/s at 100° C. and a viscosity index in the range of 133 to 160, and the below-described additive components: a) nitrogen-containing ashless dispersant in an amount of 0.01-0.3 wt. % in terms of nitrogen content; b) an alkaline earth metal-containing detergent in an amount of 0.08-0.3 wt. % in terms of alkaline earth metal content; c) a phosphorus-containing wear inhibitor in an amount of 0.05-0.12 wt. % in terms of phosphorus content; d) an oxidation inhibitor selected from the group consisting of amine compounds, phenol compounds, and molybdenum compounds, in an amount of 0.1-7 wt. %, and e) a viscosity index improver in an amount of 0.5-20 wt. %, wherein the amounts of the additive components are in terms of wt. % based on a total amount of the lubricating oil composition. ### Claim 2 (depends on 1) The lubricating oil composition of claim 1, which comprises a mineral base oil showing a kinematic viscosity in the range of 5 to 9 mm2/s at 100° C. and a viscosity index in the range of 133 to 160. ### Claim 3 (depends on 1) The lubricating oil composition of claim 1, wherein the base oil shows a viscosity index in the range of 133 to 160 and is produced by subjecting slack wax or synthetic wax obtained by Fischer-Tropsch process to a hydrogenation-isomerization process, distillation and dewaxing. ### Claim 4 (depends on 1) The lubricating oil composition of claim 1, which contains an organic sulfur-containing compound. ### Claim 5 (depends on 1) The lubricating oil composition of claim 1, which is used for lubricating motorcycles equipped with a four cycle gasoline engine. ### Claim 6 (depends on 1) The lubricating oil composition of claim 1, which is used for lubricating a diesel engine mounted on motor cars equipped with an exhaust gas post-processing apparatus. ### Claim 7 (depends on 1) A method of lubricating a four cycle gasoline engine of a motorcycle with the lubricating oil composition of claim 1. ### Claim 8 (depends on 1) A method of lubricating a diesel engine mounted on motor cars equipped with an exhaust gas post-processing apparatus employing the lubrication oil composition of claim 1. ### Claim 9 (depends on 1) The lubricating oil composition of claim 1, wherein the viscosity index improver is selected from the group consisting of a polymethacryl viscosity index improver, an olefin copolymer viscosity index improver and mixtures thereof. ### Claim 10 (depends on 9) The lubricating oil composition of claim 9, wherein the polymethacryl viscosity index improver is a polymethacrylate viscosity index improver. ### Claim 11 (depends on 9) The lubricating oil composition of claim 9, wherein the olefin copolymer viscosity index improver is selected from the group consisting of an ethylene-propylene copolymer viscosity index improver, styrene-butadiene copolymer viscosity index improver, polyisoprene viscosity index improver and mixtures thereof.