Sometimes a short question doesn't mean a short answer. The question of how much oil was flowing from the well during the period that the well was open to flow and how much in total was spilled, have...
Somewhere between 90-180 million gallons of oil has been spilled into the Gulf of Mexico from the 2010 BP oil spill. On June 19th, the official estimate is 35,000 to 60,000 barrels a day, though...