“Gasoline’s price will increase up to 9 percent, and diesel fuel will rise by up to 14 percent by 2017 because of the Renewable Fuel Standard (RFS) if Congress does not repeal it,” the Congressional Budget Office (CBO) said Thursday, according to a report in The Hill.

The CBO’s analysis estimated that, in order to comply with the increasing mandates called for under the Energy Independence and Security Act, fuel refiners would have to more than triple their use of advanced biofuels by 2017 and would have to use much more ethanol in gasoline than the 10 percent blend that older vehicles can tolerate.

The agency predicted that the Environmental Protection Agency, which oversees the RFS, will keep the mandate levels similar through 2017, since increasing them “would require a large and rapid increase in the use of advanced biofuels and would cause the total percentage of ethanol in the nation’s gasoline supply to rise to levels that would require significant changes in the infrastructure of fueling stations.”