The U.S. oil reserve is at a 40-year low — but the government says there’s still plenty of breathing room

Energy Department says operational minimum for the storage caverns is about 70 million barrels, a level far lower than oil industry estimates

Source: [MarketWatch](https://www.marketwatch.com/story/the-u-s-oil-reserve-is-at-a-40-year-low-but-the-government-says-theres-still-plenty-of-breathing-room-04ebd69c?mod=mw_rss_topstories)