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Having low aromatic compounds, high cetane rating, higher heat of combustion and almost zero sulphur content, a new paraffinic fuel (NPF), developed by Oroboros AB Sweden, was believed to receive attention as a new alternative fuel. Therefore, further investigation and combustion analyses were conducted in a research single-cylinder diesel engine, where detailed thermodynamic analyses were performed by Burst to File high frequency signal sampling code and by the Dragon software, revealing the real thermochemistry history. The aim of this investigation was an effort to reduce the pollution levels in Santiago de Chile by introducing this new paraffinic fuel (NPF). Experimental results have shown that the NPF fuel has a significant impact not only on the emission levels, but also on other energetic parameters of the engine such as ignition delay, cylinder peak pressure, heat release gradient, indicated efficiency etc.