The moves will allow expanded sales of a higher-ethanol blend known as E15, which is often restricted in the summer.

As gas prices surge, farm groups urge Congress to allow year-round sales of E15 ethanol, which could offer cheaper fuel.

If you're a casual driver and don't pay much mind to the specifics of fuel composition, filling up at the gas station can be confusing, especially if it's a new car. Whether you're topping off a humble sedan or gassing up a high-performance motorcycle, you ...