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