Toa Nenryo Kogyo Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Sadao Wada

Michihide Tokashiki

Kenyu Akiyama

Koh Watanabe

A synthetic lubricating oil composition which is suitable for lubrication of mechanical super charger, which composition comprises

Synthetic lubricating oil composition

A wear-resistant, synthetic lubricating oil composition comprises as a base oil a synthetic oil mixture consisting of (A) a diester of an aliphatic dibasic acid having 4-14 carbon atoms and an alcohol having so many carbon atoms or a mixture of several such diesters and having a viscosity at 100.degree. C. of 2.0-7.0 mm.sup.2 /s, and (B) a polyoxyalkylene glycol whose alkylene group contains 2-5 carbon atoms or a mixture of several such glycols and having a viscosity at 100.degree. C. of at least 20 mm.sup.2 /s. The base oil exhibits viscosity values of 9 mm.sup.2 /s or above at 100.degree. C. and 6.times.10.sup.4 mPa.s or below at -40.degree. C.

Synthetic lubrication oil compositions

A filter of a nonwoven fabric capable of removing particles from a fluid has attached to the fibers of said fabric a polymeric substance having a functional group capable of adsorbing said particles. In a preferred embodiment the filter is used to remove carbonaceous particles from a hydrocarbon liquid.

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Shiki, Japan

Sadao Wada