In this Feb. 13, 2012 photo, a gas station attendant pumps gas, in Portland, Ore. At an average of $3.51 a gallon, gas is up 23 percent since Jan. 1. And experts say motorists could pay a record $4.25 a gallon by late April. (AP Photo/Rick Bowmer)

Ethanol Proponents Accuse Oil Industry Of Forcing Out The Competition

Senators demand feds investigate allegations that gas station owners are being strong-armed by oil companies.