You don't always get what you pay for at the pump

In this project by the Scripps Howard News Service, reporter Isaac Wolf investigates the chemical makeup of national gasoline brands. An independent lab test of five different national brands reveals that they "differ widely in their levels of crucial engine-cleaning detergent additives." The levels of detergent additives can impact a vehicle's engine quality as well as the environment. Although the additives are required by the Environmental Protection Agency, "some automotive and fuel experts contend the Environmental Protection Agency's minimum standard is outdated."