t of at most 0.035% by weight. [0027] The invention further relates to a process for improving the lubricity of fuel oils having a maximum sulfur content of 0.035% by weight by adding the additive according to the invention to the fuel oils. [0028] Preferred fatty acids which are a constituent of the esters A) are those having from 10 to 26 carbon atoms, in particular from 12 to 22 carbon atoms.