The price of regular unleaded gasoline fell 5 cents, averaging $2.80 across Iowa according to AAA. As of Wednesday, the price of regular unleaded gasoline averaged $2.80 across Iowa according to AAA. Prices fell 5 cents from last week’s price and are down 25 cents from a year ago. The national average on Wednesday was $3.08, down 3 cents from last week’s price. Retail diesel prices in Iowa fell 3 cents this week with a statewide average of $3.31. One year ago, diesel prices averaged $4.30 in Iowa. The current Iowa diesel price is 24 cents lower than the national average of $3.55. Tips for saving energy on the road or at home are available at energy.gov and fueleconomy.gov.