Investigation of the effect of boron additive to lubricating oil on engine performance, exhaust, and emissions

In this study, the effect of adding doped boron to lubricating oil on engine performance and emissions, in the cases of using gasoline and natural gas as fuel, was investigated in a spark ignition engine. The engine was initially run on a mixture of undoped boron lubricating oil, gasoline, and natural gas. Subsequently, engine performance and emission values were measured in the work, after the engine was run for 50 h. The same measurements were repeated for both the initial values and the values after 50 h with gasoline and natural gas by adding boron to the lubricating oil. Experimental results revealed that using boron-doped lubricating oil causes an average of 2.4-8% reduction in specific fuel consumption when using gasoline and natural gas as fuel in the engine. It was found that the use of boron in the lubricating oil did not make a significant change in C2, CO, and HC emissions, but caused a significant 11.4-12.9% reduction in NOX emissions. As a result, it was observed that adding boron-doped lubricating oil in a gasoline engine provides a relative improvement in engine performance and emissions.