and aliphatic fatty tertiary amines wherein the aliphatic group usually contains above about eight carbon atoms so as to render the compound suitably oil soluble also suitable are aliphatic substituted succinimides formed by reacting one or more aliphatic succinic acids or anhydrides with ammonia or other primary amines such as those taught in ep a 0389237 as well as mixtures of two or more friction modifiers friction modifiers suitable for use in the present invention are described in the following u s patents incorporated herein by reference for their disclosures relating to friction modifiers u s pat nos 5 344 579 5 372 735 and 5 441 656 polyol esters suitable for use in the present invention include the esters obtained by reacting a polyol such as glycerol and sorbitan with a fatty acid examples of preferred polyol esters include glycerol monooleate glycerol dioleate glycerol monolaurate sorbitan monooleate and mixtures thereof generally speaking the compositions of this invention will contain up to about 1 25 wt on an active ingredient basis and preferably up to about 1 wt on an active ingredient basis of one or more friction modifiers the compositions of the present invention optionally but preferably contain a viscosity index improver vii preferred.