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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsThe Strategic Petroleum Reserve (SPR) is a federally owned stockpile of crude oil stored in underground salt caverns on the Texas and Louisiana Gulf Coasts. It is intended as a safeguard against major petroleum supply disruptions—not as a ready supply of gasoline for stations. The U.S. Department of Energy (DOE) reported 294.1 million barrels in the reserve on August 20, 2026, compared with authorized storage capacity of 714 million barrels.
What the Strategic Petroleum Reserve is—and why it exists
The SPR is an emergency stockpile of crude oil owned and operated by the federal government through DOE. Congress established it under the Energy Policy and Conservation Act (EPCA) of 1975, following the 1973–74 oil embargo; DOE records the first oil delivery in July 1977. Its purpose is to help the country respond to major petroleum supply disruptions and strengthen energy security. DOE’s history of the SPR explains its creation and development.
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The oil is held in solution-mined caverns in natural salt domes, not in above-ground tanks. DOE operates four Gulf Coast sites: Bayou Choctaw, Big Hill, Bryan Mound, and West Hackberry. The location provides proximity to refineries and links to commercial distribution infrastructure. DOE’s SPR Quick Facts describes the sites and the reserve’s current capacity.
How an emergency release reaches the market
A presidential emergency drawdown is governed by statutory conditions under EPCA. When an eligible disruption prompts a presidential decision, DOE arranges competitive sales, awards contracts, and coordinates pumping and delivery through the reserve’s connections and commercial distribution system. DOE says oil can begin entering the market within 13 days of the presidential decision. That timeframe covers the process of selling and arranging delivery; it does not mean crude instantly becomes gasoline at local stations. DOE’s SPR FAQs explain the release process.
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DOE lists a maximum nominal drawdown capability of 4.4 million barrels per day. This is the reserve’s stated maximum release rate, not a promise of that volume every day or a measure of how quickly fuel will reach consumers. Actual deliveries depend on the sale and logistics process, and crude must still be refined into products such as gasoline and diesel.
Emergency drawdowns, exchanges, and other sales are different
A decline in SPR inventory does not, on its own, show that the President ordered an emergency drawdown. Oil can leave the reserve through several mechanisms, with different authorities and purposes.
| Mechanism | How it works |
|---|---|
| Presidential emergency drawdown | Authorized under statutory conditions to address a qualifying petroleum supply disruption. DOE sells the released crude competitively. |
| Secretary-authorized exchange | Can address a temporary supply disruption. A recipient generally returns oil later, often with an additional premium. |
| Test sale | DOE sells oil to evaluate operational readiness. |
| Congressional sale | Congress directs a sale for a specified purpose; this is distinct from an emergency drawdown. |
DOE describes these mechanisms in its SPR FAQs and history of SPR releases.
How much oil is in the SPR?
DOE’s site inventory table reports 294.1 million barrels on August 20, 2026. The agency lists authorized capacity at 714 million barrels. These figures measure different things: capacity is the authorized storage ceiling, while inventory is the amount held on the stated date. The August 20 table breaks the total down by site and crude grade:
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| DOE site | Inventory on August 20, 2026 |
|---|---|
| Bayou Choctaw | 32.0 million barrels |
| Big Hill | 89.1 million barrels |
| Bryan Mound | 142.5 million barrels |
| West Hackberry | 30.5 million barrels |
| Total | 294.1 million barrels |
The same DOE table classifies 101.8 million barrels as sweet crude and 192.3 million as sour crude. The figures are an inventory snapshot dated August 20, 2026, not a claim about the amount on any later date. See the DOE inventory table.
DOE’s history records the SPR’s highest inventory as 726.6 million barrels on December 27, 2009. That historical peak is not the same measure as today’s 714-million-barrel authorized capacity. Older DOE pages may give other design or historical capacity figures; the current Quick Facts page is the source for the present authorized-capacity figure.
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Why the SPR stores crude rather than gasoline
Refineries turn crude oil into products including gasoline and diesel. The SPR stores crude, so releasing oil is not equivalent to supplying finished fuel directly to drivers or immediately resolving a local pump shortage.
DOE distinguishes sweet crude, with sulfur content no greater than 0.5 percent by weight, from sour crude, with sulfur content above 0.5 percent but below 2.0 percent. Refineries differ in which grades they can process; DOE notes that sweet crude can be processed by nearly all refiners, while that is not true of sour crude. The grade mix therefore matters when matching released oil to refinery needs. DOE says crude is less costly to acquire, store, and transport than refined products, does not degrade over time in the same way refined products do, and offers flexibility as refinery needs change. See the DOE SPR FAQs and DOE’s SPR history.
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How the U.S. has used the reserve
Past releases illustrate why it matters to distinguish emergency actions from other sales. DOE’s historical accounts describe several major episodes:
- 1991 Persian Gulf War: President George H. W. Bush authorized the first emergency drawdown. DOE reports that 17.3 million barrels were sold.
- 2005 Hurricane Katrina: Damage to Gulf production and infrastructure led to sales or exchanges totaling 20.8 million barrels.
- 2022 Russia–Ukraine war: The U.S. and International Energy Agency partners announced a coordinated release. DOE’s release-history page records 180.0 million barrels in its operational sale category; separate congressionally mandated sales also took place, so not every 2022 inventory reduction belongs to that emergency action.
- 2023: DOE reports 26 million barrels delivered through congressionally mandated sales, a separate category from emergency drawdowns.
For the underlying classifications and figures, consult DOE’s history of SPR releases and DOE’s SPR history.
What “days of supply” means
DOE reported that the reserve held 411 million barrels on December 31, 2025, equivalent to approximately 125 days of U.S. crude-oil net imports. That estimate belongs to that date and uses a net-import denominator; it should not be carried forward as a current figure or treated as 125 days of total U.S. fuel consumption.
The International Energy Agency’s 90-day obligation is also not a requirement that the SPR alone hold 90 days of oil. It concerns net-import protection across public and private stocks. DOE provides the dated import estimate in its SPR Quick Facts.
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