Retail gasoline in the U.S. slid to the lowest level in almost four months as refineries boosted production to cash in on cheaper domestic oil, offering relief to consumers who saw their costs rise last month. Pump prices averaged $3.593 a gallon yesterday, down 4.2 cents from the previous week and the lowest since March 31, data posted on the Energy Information Administration’s website show. Gasoline was 2.4 percent below 2013 levels. Drivers are seeing relief at the pumps as U.S. refiners process a record amount of oil, reversing an increase in June that boosted U.S. consumer prices. A production boom from U.S. shale formations and Canadian oil sands pushed some domestic crudes down last month to multiyear seasonal lows versus foreign grades. Oil futures in New York and London have retreated as output in Iraq has been unaffected so far by unrest there. “Refineries are running really smoothly […]