Analysis of Engine Oils from Farm Tractors in the Aspect of their Change. Agricultural Engineering , [S. l.], v. 23, n. 1, p. 25–38, 2019. DOI: 10.1515/agriceng-2019-0003. Disponível em: https://ojs.agriceng.org/index.php/AgricEng/article/view/93.. Acesso em: 8 jan. 2025.