Multipurpose oxypyridinones and their functional use-3

A lubricant composition comprising:

• a Group I, Group II, Group III, Group IV, and/or Group V lubricating oil basestock;
• a 3,4-oxypyridinone compound of structure (I):
• wherein:
• each A is individually an oxygen atom, a sulfur atom, an oxymethyl (—CH2—O—) moiety, or a thiomethyl (—CH2—S—) moiety;
• R1 is hydrogen;
• an ammonium ion;
• a C1-C6 monoalkylammonium ion;
• a C1-C6 dialkylammonium ion;
• a C1-C6 trialkylammonium ion;
• a C1-C6 tetraalkylammonium ion;
• a C1-C6 monoalkylsilyl moiety;
• a C1-C6 dialkylsilyl moiety;
• a C1-C6 trialkylsilyl moiety;
• an optionally substituted aryl, alkyl, alkaryl, or aralkyl sulfonyl moiety;
• a linear, branched, and/or cyclic C1-C20 hydrocarbyl sulfide;
• a linear, branched, and/or cyclic C1-C20 hydrocarbyl moiety;
• an at least partially halogenated linear, branched, and/or cyclic C1-C20 moiety;
• an ether-containing linear, branched, and/or cyclic C1-C20 moiety;
• a thioether-containing linear, branched, and/or cyclic C1-C20 moiety;
• an ester-containing linear, branched, and/or cyclic C1-C20 moiety;
• a thioester-containing linear, branched, and/or cyclic C1-C20 moiety;
• a linear, branched, and/or cyclic C1-C20 acyl moiety;
• a linear, branched, and/or cyclic C1-C20 thioacyl moiety;
• a linear, branched, and/or cyclic C1-C20 hydrocarbyloxyacyl moiety;
• a linear, branched, and/or cyclic C1-C20 hydrocarbyloxythioacyl moiety;
• a linear, branched, and/or cyclic C1-C20 hydrocarbylthiocarbonyl moiety;
• a linear, branched, and/or cyclic C1-C20 hydrocarbylthio-thioacyl moiety;
• an amide-containing linear, branched, and/or cyclic C1-C20 moiety;
• a thioamide-containing linear, branched, and/or cyclic C1-C20 moiety;
• a ketone-containing linear, branched, and/or cyclic C1-C20 moiety;
• a thioketone-containing linear, branched, and/or cyclic C1-C20 moiety;
• an aldehyde-containing linear, branched, and/or cyclic C1-C20 moiety;
• a thioaldehyde-containing linear, branched, and/or cyclic C1-C20 moiety;
• a mercaptan-containing linear, branched, and/or cyclic C1-C20 moiety;
• a hydroxyl-containing linear, branched, and/or cyclic C1-C20 moiety;
• a nonionic linear, branched, and/or (hetero) cyclic moiety containing 1 to 20 carbon atoms at least one nitrogen atom, and optionally at least one sulfur and/or oxygen atom;
• another 3,4-oxypyridinone connected as an ether or thioether at a meta position to the ring nitrogen thereof, or a combination thereof;
• R2 is hydrogen;
• a halogen;
• a linear, branched, and/or cyclic C1-C12 hydrocarbyl moiety;
• an at least partially halogenated linear, branched, and/or cyclic C1-C12 moiety;
• an amine-containing linear, branched, and/or cyclic C1-C20 moiety;
• an ether-containing linear, branched, and/or cyclic C1-C20 moiety;
• a hydroxyl-containing linear, branched, and/or cyclic C1-C12 moiety;
• an aldehyde-containing linear, branched, and/or cyclic C1-C20 moiety;
• a nitrile-containing linear, branched, and/or cyclic C1-C20 moiety;
• or a combination thereof;
• R3 is hydrogen;
• a halogen;
• a linear, branched, and/or cyclic C10-C24 hydrocarbyl moiety;
• or a combination thereof;
• R4 is hydrogen;
• a halogen;
• a linear, branched, and/or cyclic C1-C12 hydrocarbyl moiety;
• an at least partially halogenated linear, branched, and/or cyclic C1-C12 moiety;
• an amine-containing linear, branched, and/or cyclic C1-C20 moiety;
• an ether-containing linear, branched, and/or cyclic C1-C20 moiety;
• a hydroxyl-containing linear, branched, and/or cyclic C1-C12 moiety;
• an aldehyde-containing linear, branched, and/or cyclic C1-C20 moiety;
• a nitrile-containing linear, branched, and/or cyclic C1-C20 moiety;
• or a combination thereof;
• and
• R5 is hydrogen;
• a halogen;
• a linear, branched, and/or cyclic C1-C12 hydrocarbyl moiety;
• an at least partially halogenated linear, branched, and/or cyclic C1-C12 moiety;
• a hydroxylated linear, branched, and/or cyclic C1-C6 moiety;
• an R1-A- moiety;
• or a combination thereof;
• or alternatively one or more of R1 and R2, R2 and R3, R3 and R4, and R4 and R5 may together form one or more (hetero)cyclic rings;
• with the proviso that R1 and R3 are not both hydrogen;
• and
• either:
• a zinc dialkyldithiophosphate antiwear agent, an organic friction modifier, or both;
• or
• substantially no organic friction modifier (and optionally substantially no friction modifier).