According to PBS, utilizing the Department of Energy Spill Rate, the Macondo Well has spilled 92,340,117 gallons. That would be the equivalent of 27 months of normal Natural Seeps, prior to mitigation.

I am using the higher Natural Seep figure, just as the Department of Energy utilizes the higher Macondo Spill rate.

Considering mitigation techniques utilized, an as yet uncalculated quantity of the release was Natural Gas Hydrates, which vaporizes into the atmosphere.

An as yet uncalculated quantity was burned in the initial explosion and fire and, subsequently, in fire booms. An as yet uncalculated amount was collected by booms, vacuum barges and skimmers.

An additional unknown amount of the Oil was vaporized by the sun and an additional amount of the sunken oil was consumed by microbes and other sea life.

No one has ever performed a Natural Seep study prior to Offshore Drilling. Reality dictates that the 30,000 to 40,000 Offshore Wells that have been drilled since 1947, by lowering formation pressures, have lowered the original Natural Seeps in the Gulf of Mexico by an unknown magnitude, as the continental shelf Shallow Water formations, being closer to the surface, would have been more prone to seep.

Additionally, the Department of Energy numbers of the Macondo release were based on extrapolated pressures that are now known to be lower by thousands of pounds per square inch gage.

With these much lower pressures, the amount of Oil released would likewise be much lower than that speculated by DOE.