Lubricating oil composition
AssigneeJx Nippon Oil & Energy Corporation
InventorHitoshi Komatsubara
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Abstract
The present invention provides a lubricating oil composition that is excellent in anti-fatigue properties for metals and load bearing properties while having improved fuel efficiency. The lubricating oil composition comprises (A) one type or a mixture of two or more types of mineral base oil having a 40° C. kinematic viscosity of from 5 to 15 mm2/s; and (B) one type or a mixture of two or more types of ester-based base oil having a 40° C. kinematic viscosity of from 3 to 25 mm2/s and a 0° C. kinematic viscosity of from 10 to 130 mm2/s, the 40° C. kinematic viscosity of the mixed base oil of (A) and (B) being 18 mm2/s or lower, the blend ratio of the ester-based base oil being from 0.58 to 80 percent by mass, and the 40° C. kinematic viscosity of the composition being from 4 to 23 mm2/s.
Claims11
A lubricating oil composition comprising:
- (A) one type or a mixture of two or more types of mineral base oil having a 40° C. kinematic viscosity of from 5 to 15 mm2/s;
- and
- (B) one type or a mixture of two or more types of ester-based base oil having a 40° C. kinematic viscosity of from 3 to 25 mm2/s and a 0° C. kinematic viscosity of from 10 to 130 mm2/s, the 40° C. kinematic viscosity of the mixed base oil of (A) and (B) being 18 mm2/s or lower, the blend ratio of the ester-based base oil being from 0.58 to 80 percent by mass, and the 40° C. kinematic viscosity of the composition being from 4 to 23 mm2/s.
Dependencies are inferred from the claim text.