Problem gasoline sold in the Chicago and Milwaukee areas came from an Indiana terminal, BP says. The company suspended sales of its mid-grade and premium gasoline pending additional testing, the Chicago Tribune reported. BP announced Thursday that it believed problems at the Whiting terminal had been resolved. A batch of 50,000 barrels of gas was sent to stations last week. The company said the fuel was blended with a \"higher than normal level of polymeric residue.\" \"We\'re telling resellers to not sell premium and mid-grade in Chicagoland until we are 100 percent satisfied with the quality,\" Scott Dean, a company spokesman in Chicago, said. Car owners who believe their vehicles were damaged by the gas can file claims with the company.