Ashless lubricating oil formulations for natural gas engines comprising 1-6 succinimide dispersant and 1-6 borated succinimide dispersant

摘要

An ashless lubricating oil composition that improves the corrosion properties in natural gas engines is disclosed. The ashless lubricating oil composition comprises: a) a major amount of base oil of lubricating viscosity; b) from about 1 to 6 wt % of an untreated polyalkylene or polyalkenyl succinimide dispersant; and c) from about 1 to 6 wt % of a borated polyalkylene or polyalkenyl succinimide dispersant.