| abstract |
A lubricating composition comprises a major amount of a base oil, and an additive comprising a polyoxo Lindqvist ion of formula [M1 a M2 b Q1 c Q2 d ] q , wherein M1 and M2 may be the same or different and are chosen from Group 3-12 transition metals, the Lindqvist ion being solvated with a hydrocarbyl substituted amine, the Lindqvist ion optionally containing bound organic ligands containing electron donating groups, the additive being present in amount to provide about 0.2-3 moles of metal from the Lindqvist ion per megagram of lubricating composition. |