art suitable dicarboxylic acids include but are not limited to succinic acid maleic acid adipic acid azealic acid suberic acid phthalic acid sebacic acid linoleic acid suitable alcohols include but are not limited to butyl alcohol n pentyl alcohol iso pentyl alcohol n hexyl alcohol n heptyl alcohol n octyl alcohol isooctyl alcohol 2 ethyl hexyl alcohol nonyl alcohol isononyl alcohol decyl alcohol undecyl alcohol dodecyl alcohol tridecyl alcohol and the like specific examples of these esters include dioctyl adipiate di 2 ethylhexyl sebacate diisooctyl azealate dioctyl sebacate diisooctyl phthalate diisononyl phthalate diisodecyl adipiate diisooctyl adipiate diisononyl adipiate diisodecyl suberate and the like the preferred esters are diisodecyl adipiate diisononyl adipiate and diisooctyl adipiate having a pour point astm d97 of u2212 60 u00b0 c and lower anti wear agents are also essential components of the present invention so as to comply with original equipment manufactures oem and or military and or civilian end user specifications triaryl phosphates are the traditional anti wear agents tricresyl phosphates being the anti wear additive of choice because hydraulic fluids typically must also meet stringent low temperature viscometric properties especially the u2212 55 u00b0 c maximum pour point specification contained in mil prf 83282 the lubricants of the present invention contain a pour point depressant.