Oil in the United States Strategic Petroleum Reserve has fallen to its lowest level since 1983, the country’s Department of Energy data showed on Monday. The latest report on the country’s oil inventories showed that stocks decreased by 6.1 million barrels last week to 298.7 million barrels, falling below the 300-million-barrel mark for the first time in more than four decades. In March, US President Donald Trump ordered the release of 172 million barrels of oil from the country’s reserves in an effort to lower energy prices driven higher by the conflict with Iran.