ECONOMIC EFFICIENCY OF INSTALLING A SPARK PLUG IN THE EXHAUST SYSTEM OF THE “ONIX” AUTOMOBILE ENGINE. Modern American Journal of Engineering, Technology, and Innovation, [S. l.], v. 1, n. 3, p. 64–70, 2025. Disponível em: https://usajournals.org/index.php/2/article/view/367. Acesso em: 11 sep. 2025.