| abstract |
(A) a base oil having a lubricating viscosity of more than 50% by weight, and (b) an overbased alkaline earth metal alkyl-substituted hydroxyaromatic carboxylate of 0.1 to 40% by weight, wherein the alkyl substituent is Overbased alkaline earth metal which is a residue derived from an isomerized alpha olefin having 12 to 40 carbon atoms and which has a TBN of less than 600 mg KOH/g based on the active ingredient as measured by ASTM D2896. A lubricating oil composition comprising an alkyl-substituted hydroxyaromatic carboxylate, wherein the lubricating oil composition is a SAE 20, 30, 40, 50, or 60 monograde engine oil SAE J300 amendment January 2015 requirement. And a TBN of 5 to 200 mg KOH/g as measured by ASTM D2896. |