The average U.S. price for a gallon of regular gasoline didn’t change in the past week, so for the third week in a row, the average nationwide for a gallon of regular is at $3.43.  A year ago it was $3.58 per gallon.  In Illinois the average for a gallon of regular gas is up 5 cents to $3.55 from a week ago, that is up after a few weeks of it dropping.