Thank you for asking. Here are the facts about the 1996 release of oil:
In late April 1996, the ARCO Pipe Line Company incurred an operational emergency when its 20-inch pipeline from the Texas Gulf Coast to Cushing, Oklahoma, became blocked by a waxy crude, interrupting its oil deliveries to the midcontinent. On May 3, 1996, under an emergency crude oil lease exchange agreement with the Seaway Pipeline Company, the Energy Department agreed to supply up to one million barrels of crude oil to enable the start-up of its Freeport-to-Cushing pipeline to continue the flow of oil to the midcontinent refineries, avoiding any refinery shutdown. Under the terms of the agreement, ARCO would pay the Government a fee, plus a future price differential for leasing the oil, and would replace the oil with an equivalent grade of crude within six months. Under this lease, the Strategic Petroleum Reserve delivered a total of 900,416 barrels of crude oil to the Seaway Pipeline System. All the oil was returned by November 25, 1996.
I hope the facts clear up your anxiety.