"Hypermarkets" Offer Consumers Savings At The Gas Pump

MOUNT PROSPECT, IL - MAY 19: Fran Dietzgen pumps her gasoline at a Costco store's gas station May 19, 2005 in Mount Prospect, Illinois. Some groceries and supermarkets, as well as the larger discount chains like Costco, Wal-Mart and Sam's Club, also called "hypermarkets," can offer gas at cheaper prices than some of the name-brand gasoline stations, offering consumers an opportunity to save two to seven cents per gallon. (Photo by Tim Boyle/Getty Images)