The strategic petroleum reserve which is empty, and threatening to physically collapse as they withdraw the sludge below the 0% mark?
OP's comment was that we are at 0 and nothing left. I pointed out that they were being hyperbolic or that they don't understand the strategic reserve (or both).
I doesn't matter where the operational band is - if at about 280 M barrels - they have a reasonable amount of runway before they start hitting hard technical barriers per OP comment especially with oil flowing into the country from other sources.