Toyota Jidosha Kabushiki Kaisha

Shell Oil Comapny

Exxonmobil Research and Engineering Company

Kyodo Yushi Co., Ltd.

Kenji Ueno

Kiyonari Ishikawa

Hiroaki Hakamata

Shinya Kondo

Junichi Imai

Narihiko Yoshimura

Yasuyoshi Suzuki

Takashi Okaniwa

Eiji Nagatomi

Fumio Ueda

Koji Saito

Hitoshi Ishii

Keiichi Moriki

Kouji Saitoh

Tatsuji Suganuma

Hiroshi Fujito

Kotaro Hiraga

Nobuharu Umamori

Narihiko Tonen General Research Center Yoshimura

Antenna for an automobile

The present invention provides a lubricating oil composition comprising a mixture of both a poly-alpha-olefin and an ester compound, the lubricating oil composition having an SAE viscosity grade of 75W-85, satisfying GL-5 in terms of API gear oil designation and having a viscosity index of 160 or more. The above mixture of the poly-alpha-olefin and ester compound is preferably contained in an amount of from 75 to 90 wt % with reference to the total amount of the lubricating oil composition. The poly-alpha-olefin is preferably a mixture of a poly-alpha-olefin having low viscosity of from about 3 to 6 mm/s at 100&#xb0; C. and a poly-alpha-olefin having high viscosity of from about 35 to 45 mm/s at 100&#xb0; C.

Lubricating oil composition

The present invention provides a gear oil composition for vehicle driving systems, more specifically a gear oil composition for vehicle final reduction gears, which can improve a fuel-saving effect by reducing its viscosity and, at the same time, secure bearing fatigue life characteristics. The gear oil composition comprises a base oil (A) and another base oil (B), described below, and at least one species of additive for gear oil, and has a kinematic viscosity of 80 mm/s or less at 40&#xb0; C.:

Gear oil composition

A grease composition for constant velocity joints comprises (a) a base oil; (b) a urea thickener; (c) at least one organic molybdenum compound selected from the group consisting of molybdenum dithiocarbamate and molybdenum dithiophosphate; and (d) at least one calcium salt selected from the group consisting of calcium salts of petroleum sulfonates, calcium salts of alkyl aryl sulfonates, calcium salts of salicylate, calcium salts of phenates, calcium salts of oxidized waxes, overbasic calcium salts of petroleum sulfonates, overbasic calcium salts of alkyl aryl sulfonates, overbasic calcium salts of salicylate, overbasic calcium salts of phenates, and overbasic calcium salts of oxidized waxes. The grease composition exhibits good performance for reducing vibration and effectively lubricates the constant velocity joints to effectively reduce frictional wear and to eliminate vibration.

Grease composition for constant velocity joints

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Toyota, Japan

Kenji Ueno