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An engine oil composition which comprises a metal-containing detergent, zinc dithiophosphate, and a boron-containing ashless dispersant dissolved or dispersed in a base oil; characterized by further containing an antiwear agent having an aliphatic amide compound and either a dithiocarbamate compound

An engine oil composition which comprises a metal-containing detergent, zinc dithiophosphate, and a boron-containing ashless dispersant dissolved or dispersed in a base oil; characterized by further containing an antiwear agent having an aliphatic amide compound and either a dithiocarbamate compound or an ester derived from a fatty acid and boric acid.

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A low-phosphorous lubricating oil composition for internal combustion engines comprising: (a) a major amount of a base oil of lubricating viscosity, (b) from 0.5 to 20 wt. % of metal-containing detergent, (c) from 0.1 to 3 wt. % of a secondary zinc dithiophosphate, (d) from 0.5 to 15 wt. % of boron-

A low-phosphorous lubricating oil composition for internal combustion engines comprising: (a) a major amount of a base oil of lubricating viscosity, (b) from 0.5 to 20 wt. % of metal-containing detergent, (c) from 0.1 to 3 wt. % of a secondary zinc dithiophosphate, (d) from 0.5 to 15 wt. % of boron-containing ashless dispersant, and (e) from 0.05 to 2 wt. % of an antiwear agent comprising: (i) an oleic amide, and (ii) a compound selected from the group consisting of: (1) a molybdenum dithiocarbamate, and (2) an ester derived from glycerol, boric acid, and a fatty acid having 8-24 carbon atoms, wherein the ester is selected from the group consisting of: (a) an ester having the formula: [Figure] (I) (b) an ester having the formula: [Figure] (II) wherein X, Y, and Z are the same or different and each represents a group selected from the group consisting of a hydroxyl group and an alkylcarboxyl group.