The average price of a gallon of self-serve regular gasoline in Riverside County ticked up one-tenth of a cent Saturday to $4.607, its highest amount since May 30.

The average price has risen 15 consecutive days, including four-tenths of a cent Friday, according to figures from the AAA and the Oil Price Information Service. It is 4.9 cents more than one week ago, 28.9 cents more than one month ago and 12.4 cents more than one year ago. It has dropped $1.766 since rising to a record $6.373 on Oct. 5, 2022.

“According to Oil Price Information Service, the Phillips 66 refinery in Wilmington and Carson has begun permanently winding down operations there after announcing it would shut down by the end of this year,” Automobile Club of Southern California spokesman Doug Shupe said Thursday.

“O

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