Gas in the Vallejo-Fairfield area is down 20¢ from last week, now averaging $6.03 a gallon. Filling a 15-gallon tank in the Vallejo-Fairfield area costs about $22 more than a year ago. It is $6.03 a gallon, $1.47 more than a year ago. Filling a 15-gallon tank costs about $22 more. It is $6.03 a gallon, down 20¢ from last week but still $1.47 above a year ago. Prices are AAA's daily averages for regular gas, last updated October 21.

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