Gasoline costs are poised to push higher the U.S. regular grade retail gasoline average when the Energy Information Administration releases its survey results for May 31 from a five-week low of $3.849 gallon set on May 23, reversing two consecutive weeks in which the average fell by nearly 12 cents per gallon, according to Convenience Store Decisions. http://www.csdecisions.com/2011/05/31/gas-prices-rising-after-slumping-to-five-week-low/