The price of regular unleaded gasoline fell 5 cents, averaging $2.75 across Iowa according to AAA. As of Wednesday, the price of regular unleaded gasoline averaged $2.75 across Iowa according to AAA. Prices fell 5 cents from last week’s price and are down 21 cents from a year ago. The national average on Wednesday was $3.07, down 1 cent from last week’s price. Retail diesel prices in Iowa fell 1 cent this week with a statewide average of $3.30. One year ago, diesel prices averaged $4.18 in Iowa. The current Iowa diesel price is 24 cents lower than the national average of $3.54. Propane prices averaged $1.53 per gallon in Iowa. Home heating oil prices had a statewide average of $2.81 per gallon. Tips for saving energy on the road or at home are available at energy.gov and fueleconomy.gov.