Johnson, Nnadikwe, Iheme Chigozie, Samuel Nwaozuzu, and Tare Caroline Gillow. “Enhancing Lubricating Oil Performance Through the Integration of Viscosity Improvers in Mono-Grade and Multi-Grade Blends”. Journal Majelis Paspama 4, no. 01 (December 12, 2025): 55–78. Accessed April 17, 2026. https://paspama.org/index.php/majelis/article/view/248.