The new dicarboxylate esters offer many of the advantages of lubrication such as high viscosity indices, good low temperature properties and good oxidative stability. In addition, they can be used as additive in lubricant to improve low temperature properties. Six branched dicarboxylate esters with different chemical structures were synthesized and tested in terms of their suitability as lubricants. The esterification reaction was carried out using a Dean Stark distillation method. Fourier transformation infra-red (FTIR); proton and carbon nuclear magnetic resonance (1H-NMR and 13C-NMR), and elemental analysis were used to verify the chemical structure of synthesized dicarboxylate esters. The results showed that the esters of dicarboxylate based on 2- ethyl-1-hexanol had very good low temperature properties with pour point values at -58oC for di-2-ethyhexyl dodecanedioate (D2EHD) and less than -60 oC of di-2-ethyhexyl azelate (D2EHAz) and di-2-ethyhexyl suberate (D2EHSub). The viscosity index (VI) of all dicarboxylate esters indicated high values at the range of 178 to 216. The oxidative temperature (OT) of di-2- ethybutyl dodecanedioate (D2EBD) gave the highest value at 216 oC and di-2-ethyhexyl dodecanedioate (D2EHD) showed the highest flash point value at 200 oC. The tribological study showed that all dicarboxylate esters were non-Newtonian fluids types and has showed boundary lubrication with low coefficient of friction (COF) at 40 oC and 100 oC. In general, the results indicate that all dicarboxylate esters can be used as base oil for biolubricants.