Study the Effect of Friendly Environmental Materials Addition on Viscosity Index and Pour Point of Engine Diesel Lubricating Oil. Al-Nahrain Journal of Science, [S. l.], v. 21, n. 3, p. 105–111, 2018. Disponível em: https://mail.anjs.edu.iq/index.php/anjs/article/view/1749. Acesso em: 15 apr. 2025.