摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an automotive transmission oil composition which is excellent in seizure prevention performance, and has insulation performance, cooling performance and low temperature lubricity for imparting sufficient coolability even at low temperature. <P>SOLUTION: In the automotive transmission oil composition provided with base oil for lubricant oil, the base oil for lubricant oil comprises ester based synthetic oil by 10 to 100 mass% based on the total quantity of the base oil; wherein, kinematic viscosity at 40°C is <15 mm<SP>2</SP>/s; a viscosity index is≥120; and density at 15°C is≥0.85 g/cm<SP>3</SP>, and the heat transfer coefficient of the automotive transmission oil composition is≥780 W/m<SP>2</SP>×°C. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |