Gas prices on average dropped about 17 cents over the last two weeks, according to a national survey released Sunday.
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 price was in Cleveland, where a gallon of regular cost $2.65.
The highest was in Chicago at $3.29, according to the Lundberg Survey of 7,000 stations nationwide.
In California, the average price for regular was $3.14.
The lowest was in Sacramento at $2.93 while San Francisco remained the highest at $3.18.