The Strategic Petroleum Reserve (SPR) is an emergency stockpile of petroleum maintained by the United States Department of Energy (DOE). It is the largest publicly known emergency supply in the world; its underground tanks in Louisiana and Texas have capacity for 714 million barrels (113,500,000 m3). The United States started the petroleum reserve in 1975 to mitigate future supply disruptions as part of the international Agreement on an International Energy Program, after oil supplies were interrupted during the 1973–1974 oil embargo.
The current inventory is displayed on the SPR's website. As of March 7, 2025, the inventory was 395.3 million barrels (62,850,000 m3). This equates to about 19 days of oil at 2023 daily U.S. consumption levels of 20.275 million barrels per day (3,223,500 m3/d) or 47 days of oil at 2024 daily U.S. import levels of 8.420 million barrels per day (1,338,700 m3/d). However, the maximum total withdrawal capability from the SPR is only 4.4 million barrels per day (700,000 m3/d), so it would take about 90 days to use the entire inventory. At recent market...