RIVERSIDE, Calif. -

The average price of a gallon of self-serve regular  gasoline in the Inland Empire dropped under $4 for the first time since Feb. 5, decreasing eight-tenths of a cent to $3.993.

      The average price in Riverside and San Bernardino counties has dropped 42 times in 45 days, decreasing 29.8 cents over that span, including 1.1 cents  on Saturday, according to figures from the AAA and Oil Price Information Service.  

      The average price is 4.4 cents less than one week ago, 19.6 cents lower than one month ago and 25.1 cents below what it was one year ago.