Is it true that more oil was spilled in the Deepwater Horizon oil rig leak than by any single tanker spill?

The assertion that more oil was spilled in the Deepwater Horizon oil rig leak than by any single tanker spill is true. The Deepwater Horizon disaster, which occurred in April 2010, resulted in the release of approximately 210 million gallons of crude oil into the Gulf of Mexico over a period of 87 days. This catastrophic event represents one of the largest marine oil spills in history.

In comparison, while there have been significant tanker spills in the past, such as the Exxon Valdez incident in 1989, the volume of oil spilled from the Deepwater Horizon incident far exceeded that of any single tanker accident. The Exxon Valdez spill released about 11 million gallons of oil, showcasing how the scale of the Deepwater Horizon disaster surpasses individual tanker spills in terms of volume. This context helps clarify why the correct response to the question is true.