Understanding Petroleum Varieties

Petroleum is a complex mixture, categorized by sulfur content and density, leading to classifications like sweet and sour, light and heavy. Different grades, such as West Texas Intermediate and Brent blend, reflect the unique profiles of oil from various regions. The historical use of barrels for measurement dates back to the whiskey industry, with the standard 42-gallon barrel adopted in the 19th century to account for spillage during transport.