Business Insider | 1 billion barrels of oil have been discovered in the Gulf of Mexico Business Insider Last week's discovery capped a big day for Mexico's oil industry. Italian oil and gas company Eni raised the estimated amount of oil it discovered in March to 1 billion barrels. And, the Mexican government successfully auctioned 21 of 24 onshore oil ... Mexico Delays Next Oil Auction to Let Huge New Find Sink In |