average cost of gas by state
October 05, 2015 - Still on that downward slide for a seventh week. Regular is again lower than last week's price by several cents. The average price in California for regular gasoline decreased 4.5-cents from the previous week. The average statewide price for regular was $2.949.Mid-grade and premium prices decreased as well. The national average for self-serve regular is at $2.318, down 0.4 of a cent from the previous week.This is 63.1 cents lower than the price of regular in California.ctober 05, 2015 - Still on that downward slide for a seventh week. Regular is again lower than last week's price by several cents. The average price in California for regular gasoline decreased 4.5-cents from the previous week. The average statewide price for regular was $2.949.