Sweet Crude The name given to barrels of crude oil that meet certain content requirements, such as low levels of sulfur and hydrogen. Investopedia Says: Sweet crude future contracts are the most popular oil contracts traded on commodity markets. This type of oil is much easier to refine than sour crude. Related Terms: Barrels Of Oil Equivalent Per Day - BOE/D Commodity Crack Spread Futures North Sea Brent Crude Sour Crude |