Lubrication properties of low-sulfur diesel fuels in the presence of specific types of fatty acid derivatives

This paper presents the impact of the addition of specific types of fatty a cid derivatives on the lubrication properties of low sulfur diesel fuels. I t discusses the most recent results, concerning the influence of adding low amounts of four specific types of biodiesel and two tertiary amides on the tribological behavior of the steel-on-steel systems, lubricated with low-s ulfur automotive diesel. Experiments were carried out on the HFRR test rig. The obtained wear results have clearly shown a specific behavior of the co mponents tested, which dissolved in selected base fuels at the concentratio n range of 0.05-10%. It is concluded that a very small amount of the select ed biodiesel types and tertiary amides dramatically improves the low-sulfur diesel lubricity.