acid heptadeconoic acid stearic acid isostearic acid nonadecanoic acid eicosanoic acid heneicosanoic acid docosanoic acid tricosanoic acid tetracosanoic acid pentacosanoic acid hexacosanoic acid heptacosanoic acid octacosanoic acid saturated and unsaturated fatty acids methoxyacetic acid butoxyacetic acid ethythioacetic acid 5 oxynonylcarboxylic acid 7 chrododecanoic acid 4 isopropyl cyclohexane carboxylic acid tetradecylsuccinic acid octadecylsuccinic acid and naphthenic acids as obtained in the distillation of crude oil particularly preferred are tetrapropenylsuccinic acid oleic acid and the naphthenic acids representative phosphorus containing acids include dioctyl hydrogen phosphate didodecyl hydrogen phosphate dipentadecyl hydrogen phosphate octacosyl hydrogen phosphate tridecyl pentadecyl hydrogen phosphate eicosyl nonyldecyl hydrogen phosphate heptadecyl propyl hydrogen phosphate methyldodecyl hydrogen phosphate ethyl decyl hydrogen phosphate isopropyl eicosyl hydrogen phosphate docosyl phosphinic acid octyl phosphinic acid dodecylphenyl phosphinic acid didecyl hydrogen phosphite dodecylphenyl dihydrogen phosphite octyl benzyl hydrogen phosphite octadecyl dihydrogen phosphite hexacosyl dihydrogen phosphite nonyl tridecyl hydrogen phosphite butyl eicosyl hydrogen phosphite heptadecyl hydrogen phosphonite triacontyl hydrogen phosphonite docosyl hydrogen phosphonite dodecyl hydrogen propanephosphonite octyl hydrogen dodecanephosphonite tridecylphenyl hydrogen phosphonite tetradecyl hydrogen benzenephosphonite octadecane phosphinous acid and undecylbenzene phosphinous acid representative sulfur containing acids include octanesulfonic acid decanesulfonic acid octadecane sulfonic acid 8 tetradecenesulfonic acid 2 tridecenesulfonic acid 4 butylcyclohexane sulfonic acid octyl hydrogen sulfate monyldecyl hydrogen sulfate tetradecyl hydrogen sulfate the lubricating oil to which the borates and the oil soluble acid are added can be any hydrocarbon based lubricating oil or a synthetic base oil stock the hydrocarbon lubricating oils may be derived from synthetic or natural sources and may be paraffinic naphthenic or asphaltic base or mixtures thereof.