additive c consisted of a zirconium salt additive obtained from mooney chemicals inc cleveland ohio known as mooney 320 it is believed to contain zirconium 2 ethylhexoate it should be observed that the exact composition of these above described formulations is not generally made public by the manufacturers of the respective compositions and can be at best only approximated analytically by considerable effort nevertheless the presence of certain functional groups can be established with relative certainty and to a degree sufficient to illustrate the effectiveness of the compositions of this invention relative to previously described compositions in addition these compositions and information regarding their use are of course available from the respective manufacturers noted above table i______________________________________ timken ok change fromexample additive sup 1 load lbs a alone______________________________________1 none 0 802 a 803 a b 55 254 a c 70 105 b c 50 306 a b c 85 5______________________________________ sup 1 a at a conc of 11 b at a conc of 0 65 and c at a conc of 0 5 comparison of examples 1 and 2 indicates that the alkali metal borate additive dramatically increases the extreme pressure properties of the base oil comparison of examples 2 and 3 indicates that the sulfur phosphorus additive lowers the extreme pressure properties of the borate containing oil comparison of examples 2 and 4 indicates that the zirconium ester also lowers the extreme pressure properties of the borate containing oil comparison of examples 1 and 5 indicates that the composition of u s pat no 4 171 268 gives a modest improvement in the timken ok load comparison of examples 1 through 5 with 6 indicates that although.