| abstract |
This invention encompasses trunk piston engine lubricating oil compositions, comprising a major amount of one or more Group I base oils; and one or more dispersant additives, wherein the concentration of the one or more dispersant additives within the trunk piston engine lubricating oil composition is about 0.2-0.6 wt.% on an actives basis; and methods for making and using the trunk piston engine lubricating oil compositions. |