Tribological Effects of Mineral-Oil Lubricant Contamination with Biofuels: A Pin-on-Disk Tribometry and Wear Study

Table 2

Properties of Mobil Delvac Elite 15W-40 oil, from [16].

Properties	Method	Base engine oil
Viscosity, cst	ASTM D 445	111c at 40°C,15.2 at 100°C
Viscosity index	ASTM D 2270	140
Sulfated Ash, wt%	ASTM D 874	0.9
Total base number, mg KOH/g	ASTM D 2896	10.7
Pour point, °C	ASTM D 97	−36
Flash point, °C	ASTM D 92	241
Density at 15°C kg/L	ASTM D 4052	0.872