ASTM D1217 Density and Relative Density (Specific Gravity) of Liquids by Bingham Pycnometer
Density is the mass per unit volume (for example; g/ml) of a substance. Specific gravity (relative density) is a related value of the density of the oil relative to the density of water at a specified temperature. In lubricating oils density may help predict pumpability, propensity to cavitation, the rate contaminants will settle out of the oil (important for filtration systems), and the location of water contamination. This method determines the density and/or specific gravity of lubricating oils.
A cleaned, tared pycnometer is filled with cooled sample and carefully brought to the test temperature. The density is reported in g/ml and the specific gravity (relative density) is reported as a unitless number as is customary. Please provide the test temperature.