Pennsylvania motorists are paying a little less this week as they top off the tank. As reported by Triple-A, the average price for a gallon of regular fell Friday in the Keystone State to a couple of tenths over three dollars, and sixth-three cents, this as the corresponding national figure rose to a few tenths under three forty-six. Mississippi remains the low-price king, posting a per-gallon figure of three tenths over two ninety-three. Here in Blair County the cost of a gallon of gas is three dollars and sixty-five cents.