abstract |
The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % C A of not more than 2, % C P /% C N of not less than 6 and an iodine value of not more than 2.5. |