Abstract: This inventions relates to lubricating compositions endowed with high antiwear properties comprising:A) from 100 to 0.1%, but preferably from 10 to 0.5% by weight of a polyether of general formula: ##STR1## where: T, T' either the same or different from each other are inert end groups --CF.sub.2 X, --C.sub.2 F.sub.4 X, --C.sub.3 F.sub.6 X or fluorinated reactive end groups containing carboxylic and/or alcoholic and/or ketonic and/or amidic and/or aminic and/or alkoxylic, at least one of T and T' being one of said reactive end groups;X=F, Cl;m, n, s, p=integers such that the polyether has an average molecular wieght ranging from 1,000 to 100,000, on conditions that, when none of them is zero, s/p is about 10, s/n ranges from 0.5 to 1.5, n/m is about 10, while when n is zero, s/n is about 10 and s/m is about 20, while when s, p are zero, n/m ranges from 0.6 to 2;B) from 0 to 99.9%, but preferably from 90 to 99.5% by weight of a perfluoropolyether having non-reactive end groups.