Gas in the Washington area is down 10¢ from last week, now averaging $4.17 a gallon. Filling a 15-gallon tank in the Washington area costs about $15 more than a year ago. It is $4.17 a gallon, 97¢ more than a year ago. Filling a 15-gallon tank costs about $15 more. It is $4.17 a gallon, down 10¢ from last week but still 97¢ above a year ago. Prices are AAA's daily averages for regular gas, last updated October 19.

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