the hydrazine hydrate with either phenyl phosphorodichloridothioate or o o diphenyl phosphorochloridothioate see examples 1 and 2 below these two particular hydrazidothioate compounds may of course by synthesized by other conventional methods and the present invention is not intended to be limited to any particular method of making the compound regardless of the method of synthesis the desired compound may be recovered from the reaction mixture by any conventional recovery method including filtration extraction and recrystallization as previously indicated the compounds of the present invention are substantially ashless in nature for purposes of this invention an ashless additive is one which shows substantially no ash when tested according to the procedure set forth in ansi astm d482 74 it is generally considered by those skilled in this art that load carrying additives may be divided into two classes namely antiwear and extreme pressure additives when two lubricated moving surfaces are lightly loaded against each other they are separated by an elastohydrodynamic oil film as the load increases so the oil film thickness decreases when the oil thickness approaches the dimensions of the surface roughness it will be penetrated by surface asperities it is in this region that antiwear additives function by improving the oil film strength and reducing intermetallic contact as the load is increased further the bulk oil film collapses and mere antiwear additives are no longer sufficient to protect the surface in this latter region extreme pressure ep additives function by reacting with the metal surface.