The Super Duper at 17768 Wash.-536 in Mount Vernon is selling the cheapest midgrade unleaded gasoline near zip code 98257 this week, according to GasBuddy.com.
The average cost for a gallon of midgrade unleaded gas in or near zip code 98295 for the week of January 6-12 is $2.86, according to GasBuddy.com. The lowest price is $2.74.