The average U.S. price of gasoline dropped about 17 cents over the last two weeks, according to the latest Lundberg Survey of 7,000 stations nationwide.

The average price for regular was $2.88 a gallon, mid-grade was $3.01 and premium was $3.12, said oil industry analyst Trilby Lundberg.

The nation's lowest average price, $2.65, was in Cleveland; the highest was in Chicago at $3.29.