Amine salts of sulfur-containing alkylated phenols or alkylated naphthols as multifunctional antioxidant and antiwear additives

An improved lubricant composition comprising a major proportion of said lubricant or fuel and a minor multifunctional antiwear, antioxidant proportion of an additive product of reaction comprising an amine salt of a sulfur-containing hydrocarbyl phenol or naphthol prepared from (1) the reaction of a hydrocarbyl phenol or naphthol and a quaternary ammonium salt in the presence of an organic or inorganic base and a protic or aprotic solvent and (2) thereafter reacting in situ the resulting phenol-naphthol quaternary ammonium complex and elemental sulfur in a non-sulfur reactive solvent at temperatures varying from about 25.degree. to about 300.degree. C., pressures varying from ambient to slightly higher or autogenous for a time sufficient to obtain the desired tetra-substituted ammonium salt of sulfurized hydrocarbyl phenol or naphthol.