Cleaner burning gas will cost you more money, but how much more depends on whom you ask. The EPA wants to lower sulfur content in gasoline. They say it'll increase the price of gas by a penny. Marie Dodds, with the Triple-A, says refineries are predicting a price hike as high as 9-cents a gallon. If approved, the new gas would be phased in starting in 2017. The EPA is taking comments for the next month before making a final decision.