Base oil for lubricating oil and lubricating oil composition containing said base oil
AssigneeIdemitsu Kosan Co., Ltd.
InventorTakao Yabe
Life of this patent
Estimating the term…
Abstract
A base oil for lubricating oil, a lubricating oil composition containing the base oil and a phenol-based antioxidant and/or organomolybdenum compound, and also an additive for a base oil for lubricating oil, consisting of a phenol-based antioxidant and an organomolybdenum compound are disclosed. The base oil and the lubricating oil composition containing the base oil are stable against NO.sub.x gas and are useful for use in internal combustion engines. The additive, when added to a base oil, provides a lubricating oil which is stable against NO.sub.x gas and can be used effectively in a NO.sub.x gas atmosphere.
Claims17
A base oil for lubricating oil, having a kinematic viscosity as determined at 100.degree. C. of 2 to 50 cSt, an aromatic content of not more than 2%, a viscosity index of at least 75, a pour point not more than -10.degree. C., and a sulfur content of not more than 100 ppm.
A base oil for lubricating oil, which is a deep dewaxed oil having a kinematic viscosity of 100.degree. C. of 2 to 50 cSt, an aromatic content of not more than 2%, a viscosity index of at least 75, a pour point of not more than -20.degree. C. and a suflur content of not more than 100 ppm.
A lubricating oil composition comprising a base oil having a kinematic viscosity as determined at 100.degree. C. of 2 to 50 cSt and an aromatic content of not more than 2%, and a phenol-based antioxidant.
A lubricating oil composition comprising a base oil having a viscosity as determined at 100.degree. C. of 2 to 50 cSt and an aromatic content of not more than 2%, and an organomolybdenum compound.
A lubricating oil composition comprising a base oil having a viscosity as determined at 100.degree. C. of 2 to 50 cSt and an aromatic content of not more than 2%, a phenol-based antioxidant and an organomolybdenum compound.
An additive for a base oil for lubricating oil, consisting of a phenol-based antioxidant and an organomolybdenum compound.
Dependencies are inferred from the claim text.