{HEAD ~ Silver protection} in lubricant compositions is afforded by the combination of organo sulfur compounds and {TAIL ~ hydrocarbon} substituted 1,2,4 triazoles, the latter being obtained by reaction of a substantially aliphatic, substantially saturated hydrocarbon substituted dicarboxylic acid with an aminoguanidine compound 
{ HEAD ~ Silver protection } in lubricant compositions is afforded by the combination of organo sulfur compounds and { TAIL ~ hydrocarbon } substituted 1,2,4 triazoles , the latter being obtained by reaction of a substantially aliphatic , substantially saturated hydrocarbon substituted dicarboxylic acid with an aminoguanidine compound
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