Patent ID: 8586517

Claim:
An anti-wear composition, comprising: (a) a phenate and a sulfonate; and (b) a base composition comprising a combination of a metal sulfate, a metal carboxylate, a metal phosphate, and a metal carbonate; wherein the weight ratio of metal sulfate, metal carboxylate, metal phosphate, and metal carbonate, individually, to the total amount of other base present is each 1:1000 to 1000:1; wherein the phenate is a calcium phenate having a total base number from about 100 to about 600; wherein the sulfonate is a magnesium or calcium sulfonate having a total base number from about 100 to about 500; wherein the phenate and the sulfonate are overbased with the base composition to provide an overbased phenate and an overbased sulfonate; wherein the metal sulfate, metal carboxylate and metal phosphate are all reaction products of the metal carbonate; and further additionally including metal sulphate particles, metal carboxylate particles, metal phosphate particles, and metal carbonate particles added to said overbased phenate and overbased sulfonate, wherein the metal sulphate particles, the metal carboxylate particles, the metal phosphate particles, and the metal carbonate particles are each nanoparticles.