Gear oil formulation designed to meet bio-preferred criteria as well as give high performance

Mert Arca, Brajendra K. Sharma, Joseph M. Perez, Kenneth M. Doll

Research output: Contribution to journalArticlepeer-review


A bio-based gear oil was developed from soybean oil (SBO). The SBO was first thermally polymerised and then mixed with additives and diluents. The effect of pour point depressants, co-base oils, antioxidants and anti-wear additives is reported. Lubricity, viscosity index and oxidation stability of the final formulation of the bio-based gear oil are compared with commercially available gear oils. The final formulation of bio-based gear oil gives test results: viscosity index 165, four-ball wear scar 0.375 mm. These numbers are comparable to or better than the commercially available gear oils tested for comparison. The oxidation onset temperature of the bio-based gear oil, 220°C, is lower than the evaluated commercial products, but still at an acceptable range for gear oil.

Original languageEnglish (US)
Pages (from-to)326-331
Number of pages6
JournalInternational Journal of Sustainable Engineering
Issue number4
StatePublished - Dec 2013
Externally publishedYes


  • bio-based gear oil
  • lubricant formulation
  • natural industrial fluid
  • thermally polymerised soybean oil

ASJC Scopus subject areas

  • Engineering(all)


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