Mass. gas prices down another 4 cents

Massachusetts gas prices down another 4 cents per gallon; now down 13 cents in a month

BOSTON (AP) -- Gas prices in Massachusetts have dropped by four cents per gallon in the past week to an average of $3.59.

The cost of a gallon of self-serve, regular has now dropped 13 cents in the past month and is four cents below the national average.

The current in-state price is also 20 cents below the price at the same time last year.

AAA found self-serve, regular selling as low as $3.42 per gallon and as high as $3.81.