Gas in the Napa area is down 15¢ from last week, now averaging $6.19 a gallon. Filling a 15-gallon tank in the Napa area costs about $21 more than a year ago. It is $6.19 a gallon, $1.40 more than a year ago. Filling a 15-gallon tank costs about $21 more. It is $6.19 a gallon, down 15¢ from last week but still $1.40 above a year ago. Prices are AAA's daily averages for regular gas, last updated October 20.

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