Medium speed diesel engine lubricating oils

C - Chemistry – Metallurgy – 10 – M

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C10M 133/44 (2006.01) C07D 249/14 (2006.01) C10M 133/58 (2006.01) F02B 3/06 (2006.01)

Patent

CA 1303599

MEDIUM SPEED DIESEL ENGINE LUBRICATING OILS Abstract of the Invention There is provided a lubricating oil composition for use in medium speed diesel engines, such as railroad loco- motive diesel engines. This lubricating oil composition comprises an oil of lubricating viscosity and a minor amount of a reaction product that is obtained by reacting an alkyl-substituted dicarboxylic acid compound selected from the group consisting of alkyl-substituted dicarbox- ylic acids, alkyl-substituted dicarboxylic acid anhy- drides, and mixtures thereof with a basic salt of aminoguanidine under selected conditions that will provide a product rich in alkyl bis-3-amino-1,2,4-triazole.

578536

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