The average price of a gallon of gasoline nationwide has dropped 16 cents over the past three weeks.
That's according to the Lundberg Survey of fuel prices, which puts the price of a gallon of regular at $3.62.
Midgrade costs an average of $3.79 a gallon, and premium is at $3.91.
Diesel dropped 18 cents to $3.91 a gallon.
Of the cities surveyed in the lower 48 states, Jackson, Miss., has the nation's lowest average price for gas at $3.18. Seattle has the highest at $4.21.
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