Shell Oil Comapny

Shell USA, Inc.

Showa Shell Sekiyu K.k.

Shell Internationale Research Maatschappij, B.v.

Noriaki Shinoda

Keiji Tanaka

Yoshihiko Aihara

Eiji Nagatomi

Ryuji Maruyama

Yasushi Kawamura

Tetsuo Nimura

Kazushige Ohmura

Kouichi Nakazawa

Katsuji Okami

Takeo Yamamoto

Takumi Matsumoto

Takahiro Ozaki

Kazuhiro Miyajima

Hiroyuki Tazaki

Kumiko Kamata

Misato Kishi

Shinji Saitou

Kouji Saitou

Tomoyasu Wada

Shin-ichiro Shibata

Masashi Ogawa

The purpose of the present invention is to provide a lubricating oil composition capable of achieving good wear resistance and good scoring resistance of a bearing in addition to further fuel saving while maintaining durability and seizure resistance that can be used as a gear oil for a high-output, high-speed gear mechanism. A lubricating oil composition containing a combination of Fischer-Tropsch derived base oil having a low kinematic viscosity at high temperature, polyalphaolefin having a high kinematic viscosity at high temperature, and ester compound of a trivalent or higher polyol having a low kinematic viscosity at high temperature, and further contains a partial ester compound of an unsaturated fatty acid and a polyol, including a monoester compound of the unsaturated fatty acid and the polyol.

Lubricating oil composition

A lubricating oil composition for automotive transmissions is disclosed. It offers an automotive transmission (especially a fuel-saving type) which satisfies all requirements as regards the properties of resistance to churning, maintenance of the oil film and low-temperature viscosity. It comprises a GTL low viscosity base oil and a Group 1 high viscosity base oil.

Lubricating oil compositions are provided herein that comprise a mixture of: (A) a hydrocarbon as a low-viscosity constituent, (B) a polyalkylene glycol (PAG) as a high-viscosity constituent wherein the oxygen/carbon weight ratio is in the range of from 0.450 to 0.580, and (C) a compound as a control constituent wherein the oxygen/carbon weight ratio is in the range of from 0.080 to 0.350. Methods of lubricating a surface using such lubricating compositions are also provided herein.

Two-phase lubricating oil composition

The present invention provides dicyclopentadienyl molybdenum crosslinked complexes which can be represented by general formula (1) below, the use thereof as friction-modifiers and lubricating compositions which contain these compounds. In this formula X is the element oxygen or the element sulphur, Y is the element oxygen or Y is absent, and Rto Rare groups selected individually from the group comprising hydrogen, the methyl group and the ethyl group.

Organic molybdenum compounds and lubricating compositions which contain said compounds

The present invention provides novel organic molybdenum compounds, the use thereof as friction-modifiers and lubricating compositions which contain said compounds. The organic molybdenum compounds can be represented by the general formula (1) which is indicated below, wherein Aand Aare heterocyclic rings which may have substituent groups.

Organic molybdenum compounds and oil compositions containing the same

The present invention provides a molybdenum pentakis-alkylxanthate having general formula (1) which is indicated below. In this formula Rto Reach represent a group individually selected from linear chain or branched alkyl groups which have from 1 to 30 carbon atoms.

Molybdenum alkylxanthates and lubricating compositions

Urea grease composition for constant velocity joints is provided containing base oil, one or more urea thickener compounds,  

Urea grease composition for constant velocity joints

A grease composition is provided containing

Grease composition

A grease composition for constant velocity joints, having a base oil and a urea-based thickener, which grease additionally contains, (A) molybdenum sulphide dialkyldithiocarbamate and (B) 5,5-dithiobis (1,3,4-thiadiazole-2-thiol); a method of lubricating a constant velocity joint including packing it with grease and a constant velocity joint packed with said grease.

Grease composition for constant velocity joints

A grease composition having a base oil and a thickener, which grease additionally has from 0.05% to 30% by weight of sodium thiosulphate and at least 0.1% by weight of one or more additives selected from the group of: calcium salicylate, magnesium salicylate, calcium phenate, and calcium sulphonate, based on the total grease composition, and use of the grease composition to improve rust prevention and abrasion resistance. The invention also relates to a method for preparing the grease composition.

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Tokyo, Japan

Noriaki Shinoda