Oil with no dissolved gas:
Rs = 0
The usual composition is octane (C8) and higher alkanes with API gravity < 40.
May include minor organic and inorganic chemical substances.
If oil does contain dissolved gas then it is called live oil.
See Also
Natural Science / Physics / Chemistry / Chemical Substance / Oil
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum fluids
[ Live oil ]