Infineum International Limited

Jonathan P Flemming

Joseph P Hartley

An automotive lubricating oil composition for an internal combustion engine comprises (A) an oil of lubricating viscosity in a major amount; and (B) an oil-soluble zinc dithiocarbamate as an additive component in a minor amount in which each of the two amino groups is substituted with an aryl group and with either another aryl group, an aliphatic group or a hydrogen atom, the composition having not greater than 1600 ppm by mass of phosphorus, expressed as phosphorous atom.

Lubricating oil composition

An automotive lubricating oil composition for an internal combustion engine comprises (A) an oil of lubricating viscosity in a major amount; and (B) oil-soluble additive components in respective minor amounts comprising (B1) a zinc dihydrocarbyl dithiophosphate additive; and (B2) an alkylenebis(dihydrocarbyldithiocarbamate) where at least one of the hydrocarbyl groups in an aryl group, the composition having not greater than 1600 ppm by mass of phosphorus, expressed as phosphorus atom.

A crankcase lubricating oil composition for an internal combustion engine comprising (A) an oil of lubricating viscosity in a major amount; and, (B) as an additive component in a minor amount one or more, oil-soluble imides derived from a hydrogenated Diels-Alder adduct of a maleic anhydride and a furan, where the imide group has the formula &#x3e;NR, where R is an aliphatic hydrocarbyl group having 4 to 8 carbon atoms.

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Oxford, United Kingdom

Jonathan P Flemming