The average price of a gallon of self-serve regular gasoline in Riverside County dropped Monday for the 25th time in 26 days, falling 1.3 cents to $5.583, its lowest amount since March 18.
The average price has dropped 48.2 cents over the past 26 days, including 1.6 cents Sunday, according to figures from the AAA and Oil Price Information Service. It is 17.6 cents less than one week ago and 48.7 cents less than one month ago, but $1.13 more than one year ago…