Engine oil formulation with improved Sequence VIII performance

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United States of America Patent

PATENT NO 11773343
APP PUB NO 20230151292A1
SERIAL NO

17528986

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Abstract

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The present disclosure relates to methods of improving viscosity shear stability of a lubricating oil and lubricating oil composition comprising:

    a base oil of lubricating viscosity;an amount of one or more zinc dialkyl dithiophosphate compound(s);wherein the lubricating oil composition has one or both of the following ratios:a) a ratio of KV40° C.fresh to a weight % of zinc contributed by the one or more zinc dialkyl dithiophosphate compound(s) based on a total weight of the lubricating oil composition, of greater than 510, wherein KV40° C.fresh is the kinematic viscosity of the fresh lubricating oil composition at 40° C.; andb) a ratio of KV40° C.fresh to a weight % of phosphorus contributed by the one or more zinc dialkyl dithiophosphate compound(s) based on a total weight of the lubricating oil composition, of greater than 560, wherein KV40° C.fresh is the kinematic viscosity of the fresh lubricating oil composition at 40° C.

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Patent Owner(s)

Patent OwnerAddress
AFTON CHEMICAL CORPORATION500 SPRING STREET RICHMOND VA 23219

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Devlin, Mark Glen Allen, US 7 18
Dvorak, Todd Glen Allen, US 4 2
Garelick, Kenneth Mechanicsville, US 9 2

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