SALAZAR MARTÍNEZ, José Enrique2025-04-072022MARTÍNEZ OLIVARES, Adriana Cecilia; LORENZO ZÁRRAGA, Marcos Daniel. Análisis estadístico comparativo de propiedades de aceites lubricantes usados en motores de combustión interna de una planta de generación eléctrica. 2022. Dissertação (Mestrado em Engenharia Mecânica) – Universidade Centroccidental Lisandro Alvarado, Venezuela, 2022.https://rigalileo.itegam.org.br/handle/123456789/1025This work presents a comparative statistical study of the physicochemical properties of used lubricating oil samples from internal combustion engines in an electric power generation plant. The analysis is based on laboratory tests performed on 44 samples to determine the statistical significance of differences between oil brands and their relation to usage time. Normality tests, analysis of variance (ANOVA), and Tukey tests are used, revealing significant variations in properties such as viscosity, acid number, and metal content. The results support the hypothesis that lubricant performance depends on both the brand and the operating conditions.pdf.Óleo lubrificante usadoAnálise estatísticaMotores de combustão internaPropriedades físico-químicasANOVADissertação de MestradoEngenharia Mecânica