The average price of regular-grade gasoline in the U.S. jumped 10 cents a gallon over the past two weeks to $3.00.
Industry analyst Trilby Lundberg of the Lundberg Survey said Sunday that the price has spiked 41 cents over the past three months.
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Lundberg says the increase is largely driven by higher crude oil costs and the phasing-in of summer-grade gasoline, which is used to prevent smog.
The highest average price in the contiguous 48 states was $3.79 in the San Francisco Bay Area. The lowest was $2.54 in Baton Rouge, Louisiana.
The average price for diesel fuel rose 9 cents, to $3.23.