Exxonmobil Research and Engineering Company

Infineum International Limited

Frederick Wein Girshick

Jacob I Emert

Michael D Hoey

Jeremy Roger Spencer

Tushar Kanti Bera

James Christian Dodd

Richard A Skillman

Patrick Edward Godici

Antika Shlomo

A lubricating oil composition having a total base number of more than 15 mg KOH/g including oil of lubricating viscosity; detergent; and at least one compound of the formula (I) and/or formula (II): wherein Ar and Ar' represent substituted or unsubstituted aromatic moieties; L and L&#x2032; are linking moieties; each Y is independently &#x2014;ORor H(O(CR))X&#x2014;, wherein X is (CR), O or S; Rand Rare H, alkyl or aryl; Ris alkyl or aryl; each Y&#x2032; is independently Z(O(CR))X&#x2032;&#x2014;, wherein X&#x2032; is (CR), O or S; Rand Rare H, alkyl or aryl; Z is H, acyl, alkyl or aryl; z and z&#x2032; are 1 to 10; n is 0 to 10 when X is (CR)and 2 to 10 when X is O or S; n&#x2032; is 0 to 10 when X&#x2032; is (CR), and 2 to 10 when X&#x2032; is O or S; y and y&#x2032; are 1 to 30; a and a&#x2032; are 0 to 3; and m and m&#x2032; are 1 to 100, with the proviso that in compounds of formula (I), at least one Ar moiety bears at least one group Y and that in compounds of formula (II), at least one Ar&#x2032; moiety bears at least one group Y&#x2032; in wherein Z is not H.

Lubricating oil composition

Part-synthetic, aviation piston engine lubricant

Growing community of inventors

Scotch Plains, NJ, United States of America

Frederick Wein Girshick