How much oil can a supertanker hold
A supertanker holds roughly 2 million barrels or 84 million gallons of crude oil. Today's supertankers, on average, can carry about 2 million barrels or 84 million gallons of crude oil and petroleum product. The largest supertanker in the world is the Norwegian-owned Knock Nevis which is 647,955 tonnes dead-weight and can hold 4.1 million barrels of petroleum.