Effect of Graphene as a Lubricant Additive for Diesel Engines

Grzegorz Koszalka (), Eduardo Tomanik, Thiago Marinho Maria, Wania Christinelli and Wieslaw Grabon
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Grzegorz Koszalka: Faculty of Mechanical Engineering, Lublin University of Technology, 20-618 Lublin, Poland
Eduardo Tomanik: Gerdau Graphene, Sao Paulo 05424-050, Brazil
Thiago Marinho Maria: Kinix Consulting Ltda, Sao Paulo 04902-005, Brazil
Wania Christinelli: Gerdau Graphene, Sao Paulo 05424-050, Brazil
Wieslaw Grabon: Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, 35-959 Rzeszow, Poland

Energies, 2025, vol. 18, issue 2, 1-17

Abstract: Two engine oil additives with graphene were tested in diesel engines. The first was a graphene oxide (GO)-based, commercially available additive that the supplier recommends using at a 3% v / v concentration in engine oil. The second was a graphene nanoplatelet (GNP)-based additive that is under development, which is more concentrated and allows for the addition of a much smaller amount of additive. Using the GO additive results in a reduction of brake-specific fuel consumption from 0.2% to 0.7%, depending on the engine load, and a 2% reduction in fuel consumption when the engine is run without load. The use of 0.1% wt of GNPs led to 0.4% of fuel savings on an ESC emission cycle. Increasing the GNP concentration to 0.2% did not further reduce fuel consumption.

Keywords: energy efficiency; engine oil; graphene oxide; graphene nanoplatelets; fuel consumption (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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