The average price of a gallon of self-serve regular gasoline in Riverside County rose to its highest amount since Oct. 13, 2012, Sunday because of higher oil prices and refineries beginning to ship summer blend gasoline, which is more expensive to produce.

The average price rose Sunday for the seventh consecutive day, increasing four-tenths of a cent to $4.647, according to figures from the AAA and Oil Price Information Service. It has increased 5.4 cents over the past seven days, including 1.3 cents Saturday and 1.8 cents Wednesday, the largest daily increase since Nov. 13.

The average price is 5.4 cents more than one week ago, 4.2 cents higher than one month ago and $1.213 greater than one year ago. It is 4.1 cents shy of matching the record high of $4.688 set on Oct. 8, 2012. The 2012 figures included stations in San Bernardino County.

On Friday, the price of a barrel of West Texas intermediate crude on the New York Mercantile Exchange rose to its highest settlement value since Sept. 29, 2014, increasing $2.04 to $92.31. It has risen $17.10 since New Year’s Day.

Crude oil costs account for slightly more than half of the pump price, according to the U.S. Energy Information Administration.

Doug Shupe, the Automobile Club of Southern California’s corporate communications and programs manager, cites “world tensions and OPEC concerns” as the reasons for the rising oil prices.

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