The Lubrizol Corporation

Mark Davies

Patrick E Mosier

Matthew D Gieselman

William R S Barton

Stuart L Bartley

Barton J Schober

Michael R Sutton

Marina Baum

Daniel C Visger

David Price

David L Spivey

Garrett Parker

Anthony R Frank

Alexander Michlberger

Michael D Nicholls

Alexander Holmes

George S Szappanos

Adam E Franczak

Methods of reducing stochastic pre-ignition events and/or carbonaceous deposits in a gasoline-fueled engine by adding at least 10 ppm by weight of a compound having at least one alkyl succinic acid group to a gasoline fuel, wherein said compound is the product of (a) and (b), wherein: (a) is an amine with at least one tertiary nitrogen, water, or a hydrocarbyl substituted alcohol; and (b) is a hydrocarbyl-substituted succinic acid and/or anhydride.

Fuel additive compositions for gasoline direct injection engines

The invention provides a composition comprising: (a) a star polymer comprising: (i) a core portion comprising a polyvalent (meth) acrylic monomer, oligomer or polymer thereof or a polyvalent divinyl non-acrylic monomer, oligomer or polymer thereof; and (ii) at least two arms of polymerized alkyl (meth)acrylate ester; and (b) an oil of lubricating viscosity, wherein the core portion further comprises a functional group of formula (I):&#x2014;CH&#x2014;C(R)(C(&#x2550;O)A)-Y&#x2014;&#x2003;&#x2003;(I)wherein Ris hydrogen, a linear or branched alkyl group containing 1 to 5 carbon atoms; A is nitrogen or oxygen; and Y is a free radical leaving group selected from the group consisting of one or more atoms or groups of atoms which may be transferred by a radical mechanism under the polymerisation conditions, a halogen, an &#x2014;O&#x2014;N&#x2550; group and an &#x2014;S&#x2014;C(&#x2550;S)&#x2014; group. The invention further provides the use of the composition in an oil of lubricating viscosity as a dispersant, a viscosity modifier or a precursor to a dispersant viscosity modifier.

Star polymers and compositions thereof

The invention provides a lubricating composition containing (a) an oil of lubricating viscosity, (b) a phosphite having at least one hydrocarbyl group that has 4 or more carbon atoms, and (c) a compound derived from a hydroxy-carboxylic acid. The invention further relates to the use of the lubricating composition in an internal combustion engine.

Lubricating composition containing an antiwear agent

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Shanghai, China

Mark Davies