US gas prices fall 2 cents a gallon in last 2 weeks, extending summer decline

A national survey says the average price of a gallon of regular gasoline has dropped 2 cents over the last two weeks, to $3.46, bringing the decline to 25 cents over the last 11 weeks.

Industry analyst Trilby Lundberg said Sunday that falling crude oil prices drove the declines, although the drop was more moderate than earlier this summer. If crude prices don't rise, Lundberg says prices at the pump may fall more as refiners shift to winter-grade gasoline, which costs less to produce.

Baton Rouge, Louisiana, had the lowest price among cities surveyed in the Lower 48 states, with $3.11 a gallon. San Francisco had the highest at $3.88 a gallon.

The average price for a gallon of midgrade gasoline was $3.67 a gallon, and premium was $3.83.