In 2021, fuel (HTS 27) accounted for about 50 percent of U.S. ex-/imports by vessel, of which crude oil (HTS 2709) is the leading commodity. The U.S. imported about 2.2 billion barrels of crude oil in 2021, up about 82 million (3.8 percent) from 2020. A standard U.S. barrel contains 42 gallons of crude oil, which in turn yields about 44 gallons of petroleum products. About 19 gallons (43 percent) of gasoline, 10 gallons (23 percent) of diesel fuel, 4 gallons of jet fuel (9 percent), and 11 gallons of other products (25 percent) are refined from a single barrel of crude oil.
Crude oil, which is refined into gasoline, diesel, jet fuel, and other products are primarily ex-/imported by pipeline, rail, or truck from Canada or Mexico. However, tanker vessels almost exclusively move crude oil and refined petrochemicals to and from other countries around the world (e.g., Saudi Arabia, Russia, etc.).
As shown in 1st tab of the figure below Canada is by far the Nation's number 1 source of crude oil, accounting for about 1.4 billion barrels of crude oil (61.3 percent), followed by Mexico with about 212 million (9.5 percent) in 2021. Other leading sources of crude oil include Saudi Arabia, Russia, and Columbia (as shown in 2nd tab of the figure below).