In a letter to President Donald Trump, the organisations urged policymakers to advance legislation in support of a stable, efficient fuels marketplace.
"Legislation allowing the year-round, nationwide sale of E15 would improve fungibility and substantially reduce many of the complexities that arise for our industries as we operate in a national marketplace," the organisations wrote.
API previously urged congressional leadership to adopt a more balanced and up-to-date approach to E15 legislation given recent changes in the fuels landscape.
The letter also urges the White House to support legislative action providing lasting certainty to this issue and reforming the Small Refinery Exemption (SRE) programme.
"The current SRE structure has encouraged a system of winners and losers that distorts the marketplace, creates instability, and ultimately, hurts consumers," the organisations added. "A more consistent and narrowly applied SRE structure would create a far more predictable regulatory environment."
Other signatories on the letter included Growth Energy, National Association of Convenience Stores, NATSO, Representing America's Travel Centers and Truck Stops, Renewable Fuels Association, and SIGMA: America's Leading Fuel Marketers.