Excluding the regions of Crimea, Donetsk and Luhansk
The vapor pressure of lubricating oil is very low and except for certain low vacuum or very high temperature applications, is not a limiting factor in typical lubrication practice. The data below were obtained by extrapolating the boiling points, at several reduced pressures, for three common viscosity grades of lube oil.
|Oil Viscosity @ 40°C|
|Oil Temp °C||Vapour Pressure, millimeters of Mercury|