The average price of a gallon of regular-grade gasoline fell just over 1 cent nationally during the past two weeks, to $2.36.
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Industry analyst Trilby Lundberg said Sunday that the drop mostly results from a dip in crude oil costs. Lundberg says the current price is 46 cents a gallon above what it was a year ago.
Gas in San Diego was the highest in the continental United States at an average of $2.82 a gallon Friday. The lowest average was in Tulsa, Oklahoma, at $2.05 a gallon.
The U.S. average diesel price is $2.57, up a penny from two weeks ago.