5) Louisiana
> Regular gas price per gallon: $3.16
> Tax per gallon: 20 cents (tied for 12th lowest)
> Number of oil refineries: 18
Louisiana is second to Texas in the number of oil refineries and gallons of oil processed per day, at more than 3.2 million barrels between its 18 major refineries. With close proximity to offshore drilling in the Gulf and the relatively low state tax on gas — 20 cents per gallon — Louisiana drivers pay some of the lowest gas prices in the nation.
4) Tennessee
> Regular gas price per gallon: $3
.08
> Tax per gallon: 21.4 cents (15th lowest)
> Number of operating oil refineries: 1
Average gas prices in Tennessee have decreased by 9.7% in the past 12 months (the fourth-biggest decline in the country). In the past month alone, gas prices fell by 28 cents, an 8.3% decrease. According to the Cost of Living Index, low gas prices help drivers in Tennessee enjoy the seventh-lowest cost of transportation in the U.S. Tennessee drivers also pay the 15th-lowest state taxes on gas in the nation, at just 21.4 cents to the gallon, according to the American Petroleum Institute.
3) Alabama
> Regular gas price per gallon: $3.07
> Tax per gallon: 20.9 cents (14th lowest)
> Number of operating oil refineries: 3
With its close proximity to the Gulf of Mexico, Alabama has three major refineries that process 120,000 barrels of crude each day. The state also had a 36-cent decrease in average gas prices in the last year — the highest decline in the nation. Gasoline prices continue to drop rapidly in the state, with an 8% decline last month alone. Transportation costs in Alabama are the ninth lowest in the country, and the state has the eighth-lowest excise tax, at 16 cents per gallon.
2) Mississippi
> Regular gas price per gallon: $3.06
> Tax per gallon: 18.8 cents (7th lowest)
> Number of operating oil refineries: 3
Gasoline prices are down about 18% from Mississippi’s yearly peak in the first week of April. The state ranks among the lowest in total taxes and fees per gallon of gas, which help keep its fuel prices low. The three refineries in Mississippi process 364,000 barrels of raw crude per day, the 11th most in the country. Low carrying costs for fuel could therefore also contribute to the state’s low gasoline prices. There is just a 19 cents per gallon tax for gas sold in Mississippi, the seventh-lowest in the country. The state also has no 
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1) South Carolina
> Regular gas price per gallon: $2.99
> Tax per gallon: 16.8 cents (4th lowest)
> Number of operating oil refineries: 0
South Carolina has the lowest average gas prices in the nation, and is the only state currently under the $3 per gallon mark. Compared to last year, gasoline prices in the state have decreased by 10.5% — tying Mississippi for the highest proportional decrease in the country. Low prices in South Carolina are likely due in part to the low tax per gallon of 16.8 cents, which is the fourth lowest in the country. South Carolina’s prices have fallen by about 19% since their early April peak of $3.70.
Read more: The 10 States With The Cheapest Gas - 24/7 Wall St. http://247wallst.com/2012/06/27/ten-states-with-gas-prices-down-near-3/#ixzz1z1A6EpLU
