Deterioration in Physical Engine Oil Properties after Different Trip Length. Kurdistan Journal of Applied Research, [S. l.], v. 6, n. 1, p. 13–20, 2021. DOI: 10.24017/science.2021.1.2. Disponível em: https://kjar.spu.edu.iq/index.php/kjar/article/view/589.. Acesso em: 8 aug. 2025.