The American Petroleum Institute (API) estimated that crude oil inventories in the United States increased by a whopping 13.4 million barrels in the week ending February 6, and more than offsetting the prior week’s draw of 11.1 million barrels. Gasoline inventories rose last week, gaining 3.3 million barrels in the week ending February 6. In the week prior, gasoline inventories rose by 4.7 million barrels.