The average price of a gallon of self-serve regular  gasoline in the Inland Empire was unchanged Tuesday, remaining at $3.609, after rising seven times in the previous eight days.

   The average price in Riverside and San Bernardino counties rose 2.2 cents over the past eight days, including one-tenth of a cent on Monday, according to figures from the AAA and Oil Price Information Service.

   The average price is 1.9 cents more than one week ago but eight-tenths of a cent less than one month ago and 5.4 cents lower than one year ago.