Infineum International Limited

Jai G Bansal

Christopher Brian Locke

Jacob I Emert

Antonio Gutierrez

Matthew David Irving

Christopher J Locke

Andrew J D Ritchie

Glen P Fetterman

Michael T Minotti

Ricardo A Bloch

Rolfe J Hartley

Stuart Briggs

Dean B Clarke

Chin Chu

Andrew Jd Ritchie

Michael Minotti

Andrew JD Ritchie

A lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene &#x3b1;-olefin copolymer having no greater than 66 mass % of units derived from ethylene, and a linear diblock copolymer including at least one block derived primarily from a vinyl aromatic hydrocarbon monomer, and at least one block derived primarily from diene monomer.

Lubricating oil compositions

A viscosity index (VI) improver concentrate containing at least one VI improver, from 0 to about 5 mass % of lubricating oil flow improver (LOFI) and diluent oil, wherein the diluent oil has a kvof at least about 3.0 cSt and a CCS at &#x2212;35&#xb0; C. of less than 3700 cPs, and wherein at least about 98 mass % of the concentrate is composed of VI improver, LOFI and diluent oil.

Viscosity index improver concentrates

Soot induced kinematic viscosity increase of lubricating oil compositions for diesel engines equipped with EGR systems can be ameliorated by selection of viscosity modifier, lubricating oil flow improvers, detergents and/or dispersants.

Soot induced kinematic viscosity increase of lubricating oil compositions for heavy duty diesel engines equipped with EGR systems operating in a condensing mode can be ameliorated by selection of viscosity modifier, lubricating oil flow improvers, detergents and dispersants.

EGR equipped diesel engines and lubricating oil compositions

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Westfield, NJ, United States of America

Jai G Bansal