Crude oil contains much more than just carbon and hydrogen; it also contains nitrogen, helium, and other gasses , as well as relatively small amounts of sulfur, heavy metals, and other impurities.

The crude oil price escalation and de-escalation formula for change in API gravity may result in payment of a higher price for a crude oil as a result of the increase in API gravity, when the ...

As defined by the U.S. Geological Survey (USGS), heavy oil is a type of crude oil characterized by an asphaltic, dense, viscous nature (similar to molasses), and its asphaltene (very large molecules ...