IMPROVEMENT OF CLEANING METHODS OF USED MOTOR OILS TO REDUCE THE NEGATIVE IMPACT ON THE ENVIRONMENT. International journal of artificial intelligence, [S. l.], v. 6, n. 01, p. 98–105, 2026. Disponível em: https://www.academicpublishers.org/journals/index.php/ijai/article/view/9709.. Acesso em: 25 jan. 2026.