# US 2019/0169526 A1 · Lubricant composition for gasoline engine and method for producing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169526 A1 - Document ID: US20190169526A1 - Status: Published application - Kind: A1 - Application number: 16/271,351 - Filed: 2019-02-08 - Published: 2019-06-06 - Earliest claimed: 2015-03-24 - Assignees: Idemitsu Kosan Co., Ltd. - Applicants: Idemitsu Kosan Co., Ltd. - Inventors: Kazushi TAMURA - Web page: https://patentgrep.com/patent/US20190169526A1 ## CPC - C10M 169/04: Mixtures of base-materials and additives - C10M 159/20: Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products - C10M 165/00: Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential - C10M 2203/1025: used as base material - C10M 2205/0285: used as base material - C10M 2207/026: with tertiary alkyl groups - C10M 2207/262: derived from hydroxy substituted aromatic acids, e.g. salicylates - C10M 2209/084: Acrylate; Methacrylate - C10M 2215/064: Di- and triaryl amines - C10M 2215/28: Amides; Imides - C10M 2219/046: Overbased sulfonic acid salts - C10M 2223/045: Metal containing thio derivatives - C10N 2010/02: Groups 1 or 11 - C10N 2010/04: Groups 2 or 12 - C10N 2030/02: Pour-point; Viscosity index - C10N 2030/04: Detergent property or dispersant property - C10N 2030/06: Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure - C10N 2030/08: Resistance to extreme temperature - C10N 2030/10: Inhibition of oxidation, e.g. anti-oxidants - C10N 2030/18: Anti-foaming property - C10N 2030/40: {Low content or no content compositions} - C10N 2030/45: {Ash-less or low ash content} - C10N 2030/52: {Base number [TBN]} - C10N 2030/68: {Shear stability} - C10N 2040/255: {Gasoline engines} - C10N 2060/14: by boron or a compound containing boron - 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 Provided is a lubricating oil composition having excellent detergency and LSPI preventing performance, and specifically a lubricating oil composition including a base oil, a calcium detergent, and a magnesium detergent and/or a sodium detergent, wherein the content of the calcium detergent as converted into a calcium atom and a mass ratio of a magnesium atom (Mg) contained in the magnesium detergent and/or a sodium atom (Na) contained in the sodium detergent to a calcium atom (Ca) [(Mg and/or Na)/Ca] fall within the specific ranges. ## Claims ### Claim at position 1 1: A lubricating oil composition, comprising a base oil, a calcium detergent, and a magnesium detergent and/or a sodium detergent, wherein a content of the calcium detergent as converted into a calcium atom is less than 2,000 ppm by mass on a basis of the whole amount of the composition, and a mass ratio of a magnesium atom (Mg) contained in the magnesium detergent and/or a sodium atom (Na) contained in the sodium detergent to a calcium atom (Ca) [(Mg and/or Na)/Ca] is 0.05 to 1.50. ### Claim at position 2 (depends on 1) 2: The lubricating oil composition according to claim 1, further comprising a poly(meth)acrylate. ### Claim at position 3 (depends on 1) 3: The lubricating oil composition according to claim 1, wherein the content of the calcium detergent as converted into a calcium atom is 800 to 1,800 ppm by mass on a basis of the whole amount of the composition. ### Claim at position 4 (depends on 1) 4: The lubricating oil composition according to claim 1, wherein a content of the magnesium detergent and/or the sodium detergent as converted to a magnesium atom and/or a sodium atom is 100 ppm by mass or more on a basis of the whole amount of the composition. ### Claim at position 5 (depends on 1) 5: The lubricating oil composition according to claim 1, wherein a content of the magnesium detergent and/or the sodium detergent as converted to a magnesium atom and/or a sodium atom is 100 to 1,500 ppm by mass on a basis of the whole amount of the composition. ### Claim at position 6 (depends on 1) 6: The lubricating oil composition according to claim 1, further comprising a succinimide and/or a boron-containing succinimide. ### Claim at position 7 (depends on 6) 7: The lubricating oil composition according to claim 6, wherein a content of nitrogen in the composition is less than 0.16 mass %. ### Claim at position 8 (depends on 6) 8: The lubricating oil composition according to claim 6, wherein a content of the boron-containing succinimide as converted into a boron atom is 600 ppm by mass or less on a basis of whole amount of the composition. ### Claim at position 9 (depends on 1) 9: The lubricating oil composition according to claim 1, wherein a total base number of at least one of the magnesium detergent and the sodium detergent by the perchloric acid method as prescribed in JIS K2501 is 150 to 650 mg/KOH. ### Claim at position 10 (depends on 1) 10: The lubricating oil composition according to claim 1, wherein the content of the calcium detergent as converted into a calcium atom is 800 ppm by mass or more on a basis of the whole amount of the composition. ### Claim at position 11 (depends on 1) 11: The lubricating oil composition according to claim 1, wherein the content of the calcium detergent as converted into a calcium atom is 800 to 1,500 ppm by mass or more on a basis of the whole amount of the composition. ### Claim at position 12 (depends on 1) 12: The lubricating oil composition according to claim 1, wherein a content of the magnesium detergent and/or the sodium detergent as converted to a magnesium atom and/or a sodium atom is 300 to 1,000 ppm by mass on a basis of the whole amount of the composition. ### Claim at position 13 (depends on 1) 13: The lubricating oil composition according to claim 1, wherein the base oil is at least one selected from the group consisting of a mineral oil and a synthetic oil which are classified into Groups 3 to 5 of the base stock categories of the API (American Petroleum Institute). ### Claim at position 14 (depends on 1) 14: The lubricating oil composition according to claim 1, which has a kinematic viscosity at 100° C. of 3.8 to 12.5 mm2/s. ### Claim at position 15 (depends on 1) 15: The lubricating oil composition according to claim 1, which is suitable for a gasoline engine mounted with a direct injection supercharger. ### Claim at position 16 16: A method for producing a lubricating oil composition, the method comprising: blending a base oil with a calcium detergent and a magnesium detergent and/or a sodium detergent, such that a content of the calcium detergent as converted into a calcium atom is less than 2,000 ppm by mass on a basis of the whole amount of the composition, and a mass ratio of a magnesium atom (Mg) contained in the magnesium detergent and/or a sodium atom (Na) contained in the sodium detergent to a calcium atom (Ca) [(Mg and/or Na)/Ca] is 0.05 to 1.50.