The EPA has challenged some car companies on their gas mileage claims . EPA road tests only a fraction of vehicles , while car companies basically use other methods . Comment: Consumers have responded , driven by saving money at the pump .
The EPA has challenged some car companies on their gas mileage claims . EPA road tests only a fraction of vehicles , while car companies basically use other methods . The Obama administration has pushed through tougher standards for better gas mileage . Consumers have responded , driven by saving money at the pump .