The group also dismissed the prospect of legislation to eliminate or reduce the RFS, standing by the EPA's authority to monitor the ethanol market.
"It's always hard to predict what happens under that capitol dome, but if you just look at all the legislative items in the queue that they haven't been able to deal with yet – and they are only in for a short number of days in September – it's pretty hard to see them moving forward," Buis said, speculating that this summer's House committee review of the RFS created more awareness about the policy's benefits.
But even though the legislature may not have time to consider alterations the RFS, the EPA earlier this month indicated that it may scale back volume mandates based on the economy's demand for renewable fuels.
Though the EPA didn't offer any hard numbers, Buis said Growth Energy supports the agency's role in the RFS.
"We don't feel (legislative) changes are necessary and here's why – the EPA has the authority to address any changes with RFS. They indicated that they are monitoring this very closely and I don't know why anyone would want legislative changes when the authority already exists," Buis said.
Despite pushback from some legislators, Growth Energy's campaign release coincides with an August request from Sens. Chuck Grassley, R-Iowa, and Amy Klobuchar, D-Minn., for the Federal Trade Commission to investigate alleged anti-competitive practices by oil companies.
In a statement regarding the request, Grassley specifically noted ongoing spars between oil and ethanol industries.
"The allegations from retailers about possible anticompetitive practices from Big Oil are disheartening, but not surprising, knowing the lengths Big Oil will go to in order to keep biofuels out of the fuel supply," Grassley said.
The two Senators suggested oil companies may be undermining efforts to distribute renewable fuels, including higher ethanol gasoline blends. The FTC subsequently announced that it will evaluate and investigate the situation.