United States THUMS crude oil Assay
THUMS API gravity: 17Anything below 15 API would be considered an extra-heavy crude. Tim FitzgibbonA medium crude is in the 25-35 API range, and a heavy crude is in the 15-25 API range Tim Fitzgibbon
API = (141.5/Specific Gravity) - 131.5
Barrels of THUMS crude oil per metric ton
In the oil industry, quantities of crude oil are often measured in metric tons. THUMS 6.6 bbl per MT.
THUMS Sulfur: 1.5%
Sulfur is considered an undesirable contaminant because, when burned, it generates sulfur oxides.
As a general rule, a crude oil grade with high sulfur content will have a lower value. This type of crude is often referred to as a sour crude.