US2018355274A1PendingUtilityA1

Gas engine lubricating oil composition, and method for improving fuel consumption and/or for reducing abnormal combustion

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Assignee: JXTG NIPPON OIL & ENERGY CORPPriority: Jun 8, 2017Filed: Jun 7, 2018Published: Dec 13, 2018
Est. expiryJun 8, 2037(~10.8 yrs left)· nominal 20-yr term from priority
Inventors:Akira Koyama
C10M 141/10C10M 2203/1025C10M 2209/08C10M 169/04C10M 2215/28C10N 2030/45C10N 2040/255C10N 2030/10C10N 2030/06C10M 2203/003C10M 2207/144C10M 133/06C10M 2217/028C10M 2215/064C10M 2223/045C10N 2010/04C10M 2215/06C10N 2030/72C10N 2030/54C10M 2223/042C10N 2010/12C10N 2040/25C10M 2227/066C10N 2030/52C10M 2209/084C10M 2215/26C10M 141/12C10M 169/048C10N 2030/02C10M 137/06C10M 2207/026C10M 129/54C10N 2030/041C10N 2230/10C10N 2230/041C10N 2240/104C10N 2230/06C10N 2230/02C10N 2230/54
51
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Claims

Abstract

A gas engine lubricating oil composition, comprising a lubricating base oil, an anti-wear agent which contains phosphorus as a constituent element and does not contain sulfur as a constituent element, an organomolybdenum friction modifier, a calcium salicylate detergent, and a magnesium salicylate detergent, wherein the ratio of a calcium element content in the composition to a magnesium element content in the composition is 1.50 to 1.80, and wherein the amount of sulfated ash measured in accordance with JIS K2272 is 0.6 mass % or less, is disclosed

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A gas engine lubricating oil composition comprising:
 a lubricating base oil;   an anti-wear agent which contains phosphorus as a constituent element and does not contain sulfur as a constituent element;   an organomolybdenum friction modifier;   a calcium salicylate detergent; and   a magnesium salicylate detergent;   wherein the ratio of a calcium element content in the composition to a magnesium element content in the composition is 1.50 to 1.80, and   wherein the amount of sulfated ash measured in accordance with JIS K2272 is 0.6 mass % or less.   
     
     
         2 . The gas engine lubricating oil composition according to  claim 1 , wherein the ratio of the calcium salicylate detergent content in the composition, in terms of calcium element, to the magnesium salicylate detergent content in the composition, in terms of magnesium element, is 1.50 to 1.80. 
     
     
         3 . The gas engine lubricating oil composition according to  claim 1 , having a kinematic viscosity at 100° C. of 10 to 12 mm 2 /s. 
     
     
         4 . The gas engine lubricating oil composition according to  claim 1 , further comprising at least one selected from the group consisting of an antioxidant and an ashless dispersant. 
     
     
         5 . A method for improving fuel consumption and/or for reducing abnormal combustion, the method comprising a step of lubricating a gas engine using a gas engine lubricating oil composition comprising:
 a lubricating base oil;   an anti-wear agent which contains phosphorus as a constituent element and does not contain sulfur as a constituent element;   an organomolybdenum friction modifier;   a calcium salicylate detergent; and   a magnesium salicylate detergent;   wherein the ratio of a calcium element content in the composition to a magnesium element content in the composition is 1.50 to 1.80, and   wherein the amount of sulfated ash measured in accordance with JIS K2272 is 0.6 mass % or less.

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