The U.S. Energy Information Administration reported national gasoline prices fell while Colorado regular gasoline rose 15.5 cents on the week, to $4.175. The national gasoline average fell 4.7 cents, but Colorado and Ohio prices rose and U.S. diesel rose. No cause is supplied. For October 12, EIA shows Colorado regular gasoline up 15.5 cents on the week, to $4.175, while the U.S. average fell 2.3 cents. Could regional gasoline price rises affect U.S. fuel bills? No, the national dip does not apply locally; Colorado drivers paid more at the pump this week.