Consumers tired of emptying their wallets every time they go to the gas station can turn to a free service on MSN at www.autos.msn.com to locate the least expensive gas in their area -- and save as much as $12 when they fill their tank. As gas prices continue to rise across the United States, the customized service analyzes prices at 20,000 gas stations daily to offer consumers a list of the locations with the cheapest prices in their ZIP code.
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