The average price of a gallon of self-serve regular gasoline in the Inland Empire rose three-tenths of a cent Wednesday to $3.593, the third consecutive slight increase after small declines the previous two days.

   The average price in Riverside and San Bernardino counties is 2.1 cents more than one week ago but 7 cents less than one month ago and 12.8 cents lower than one year ago, according to figures from the AAA and Oil Price Information  Service.

   The average price rose two-tenths of a cent on Monday and one-tenth of a cent Tuesday after dropping one-tenth of a cent on Saturday and two-tenths of a cent on Sunday.