ENHANCED DEPOSIT CONTROL FOR LUBRICATING OILS USED UNDER SUSTAINED HIGH LOAD CONDITIONS EMPLOYING GLYCERINE DERIVATIVE WITH A GRAFTED HINDERED PHENOLIC AND/OR A HINDERED PHENOLIC CONTAINING A THIOETHER GROUP

摘要

The present invention is directed to a lubricating oil for use in enginessubjected to sustained severe load conditions, said lubricating oil comprisinga base oil, and an additive package comprising one or more neutral/low TBN ora mixture of neutral/low TBN, and overbased/high TBN alkali or alkaline earthmetal alkyl sulfonates, alkyl phenates, alkyl salicylates, an antioxidantselected from the group consisting of glycerine derivatives comprisingglycerine grafted with a hindered phenol, hindered phenolic containing athioether group, and mixtures thereof; optionally an additional conventionalantioxidant and/or an organomolybdenum compound, and other additives, and to amethod for enhancing the deposit formation resistance of a lubricating oilused in engines operated under sustained severe load comprising the additionto the lubricant of the aforesaid additive package.