Separator Oil Relative-Volume Factor : The volume of separator oil at separator conditions of pressure and temperature divided by the volume of stock-tank oil at stock-tank conditions. (RP 44)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}