To obtain an additive capable of substantially causing no change of lubrication characteristics of a perfluoropolyether oil, e.g. a dynamic viscosity, vaporization loss, chemical stability and a viscosity index, especially the viscosity index.

The fluorinated lubricant contains a fluid point-decreasing additive of the structure: X1-O(CF2O)n(CF2CF2O)m(CF2CF2CF2O)p(CF2CF2CF2CF2O)q-X2 (I) [wherein, X1 and X2 have each the formula: -(CF2)zCF3 (wherein, z is an integer of 0-3); n is an integer of 1-200; m is an integer of 0-200; p and q are each an integer of 0-10; (p+q)/(p+q+m+n)≤0.05; m/n≤0.7; and the molecular weight of (I) is 1,000-10,000].