RIVERSIDE, Calif. -

The average price of a gallon of self-serve regular gasoline in the Inland Empire dropped Wednesday for the 15th consecutive day, decreasing six-tenths of a cent to $4.03, its lowest amount since April 1.

   The average price in Riverside and San Bernardino counties has decreased  11.9 cents over the past 15 days, including one-tenth of cent on Tuesday, according to figures from the AAA and Oil Price Information Service.

   The average price is 5.6 cents less than one week ago, 6.9 cents lower than one month ago and 3.9 cents below what it was one year ago.

   The 15-day streak of decreases is the longest since a 24-day run from May 2-25. The current streak was immediately preceded by 11 increases in 14 days which pushed the average price to its highest amount since May 19.

   The dropping pump prices stem from continuing decreases in wholesale prices, reflecting an improving supply situation, according to Jeffrey Spring of the Automobile Club of Southern California.