Gas prices

Oil companies say new EPA rules on sulfur levels in gas will increase prices several cents a gallon, but higher refining costs could play out many ways.

The producer price index -- prices received by U.S. companies -- rose 0.7 percent last month, its largest uptick in five months. Diane Swonk, chief economist with Mesirow Financial, explains what's behind the rise and whether the U.S. should be worried about inflation.

The average price of a gallon of regular unleaded gasoline is up to $3.78, according to AAA’s Daily Fuel Gauge Report.

Gas prices have risen 45 cents in the past month, but one gas station owner says he isn't making much profit from it.

The gas tax helps pay for our roads; and we’re not collecting as much money as we need.

Oklahoma not only boasts some of the lowest gas prices in the country, but also one of the highest concentrations of gas stations.

Checking back in with a gas station manager in Pelham, N.Y., after his station gets fuel.

Price-gouging during natural disaster is illegal, and New Jersey is prosecuting some gas stations after Hurricane Sandy. But gouging also is a means for distributing more broadly, because it discourages hoarding.

New York's state attorney general investigates price gouging as Craigslist ads sell gas for $20 a gallon.

Loudoun County, Virginia fence-sitters explain what got them to commit.