Originally Posted by sltr

Fact: Actually, industry consolidation is limiting competition in oil refining sector. The largest five oil refiners in the United States (ExxonMobil, ConocoPhillips, BP, Valero and Royal Dutch Shell) now control over half (56.3%) of domestic oil refinery capacity; the top ten refiners control 83%. Only ten years ago, these top five oil companies only controlled about one-third (34.5%) of domestic refinery capacity; the top ten controlled 55.6%. This dramatic increase in the control of just the top five companies makes it easier for oil companies to manipulate gasoline supplies by intentionally withholding supplies in order to drive up prices. Indeed, the U.S. Federal Trade Commission (FTC) concluded in March 2001 that oil companies had intentionally withheld supplies of gasoline from the market as a tactic to drive up prices?all as a ?profit-maximizing strategy.? A May 2004 U.S. Governmental Accountability Office (GAO) report also found that mergers in the oil industry directly led to higher prices?and this report did not even include the large mergers after the year 2000, such as ChevronTexaco and ConocoPhillips. Yet, just one week after Hurricane Katrina, the FTC approved yet another merger of refinery giants?Valero Energy and Premcor?giving Valero 13% of the national market share. These actions, while costing consumers billions of dollars in overcharges, have not been challenged by the U.S. government..