Patent ID: 8680030
Filing Date: 2014-03-25
Classification: C10M,C10N

Abstract:
1. A method for enhancing the deposit resistance of lubricating oil composition used under sustained high load conditions comprising adding to a Group II base stock oil a combination of additives comprising a minor amount of detergent comprising: i) a low TBN calcium alkyl salicylate a low TBN calcium phenate or combinations thereof at from 2.2 to 6.3 vol. % and optional overbased calcium phenate at from 0.3 to 0.5 vol. %, ii) at least two of the three of a phenolic antioxidant, a functionalized glycerine derivative with a grafted hindered phenolic moiety and a hindered phenolic containing a thioether group, wherein the phenolic antioxidant is at from about 0.75 to 2.0 vol. %, the functionalized glycerine derivative with a grafted hindered phenolic moiety is at from 0.50 to 3.0 vol. % and the hinder phenolic containing a thioether group is at from about 0.5 to 3 mass % active ingredient based on the weight of the lubricating oil composition, and iii) an organomolybdenum complex comprising molybdenum dithiocarbamate present in an amount sufficient to provide about 25 wppm to about 2000 wppm elemental molybdenum.