Long, Bill, and Ghanbar Ali Esmaeili. “Performance of Synthetic and Mineral Lubricants on Single Cylinder Air Cooled Gasoline Engines”. Journal of Agricultural Systems, Technology, and Management 1, no. 1 (October 1, 1985): 23–27. Accessed May 19, 2026. https://jastm.org/index.php/jastm/article/view/11749.