1. ASTM Standard D5949: Standard test method for pour point of petroleum (automatic pressure pulsing method). ASTM, West Conshohocken, PA, USA.
2. ASTM Standard D 56-79: Standard test method for flash point of liquids with a viscosity less than, 45 Saybolt Universal Seconds (SUS) at 37.8°C (that don’t contain suspended solids and don’t tend to form a surface film under test).
3. ASTM D 445-97: Standard test method for kinematic viscosity of transparent and opaque liquids. ASTM, West Conshohocken, PA, USA.
4. ASTM D 2270-93: Standard practice for calculating viscosity index from kinematic viscosity at 40 and 100°C. ASTM, West Conshohocken, PA, USA.
5. Ecotribology: environmentally acceptable tribological practices;Bartz;Tribol. Int.,2006