A bill introduced in the U.S. House of Representatives would mean additional testing for the use of 15% ethanol in regular gasoline.

Rep. Jim Sensenbrenner (R-WI) introduced the legislation to require the Environmental Protection Agency to seek independent scientific analysis on the effects of 15 percent blend ethanol gasoline.

Sensenbrenner says he has “serious concerns that the EPA used only one Department of Energy test and rushed E15’s introduction into the market place. This test was limited in scope and ignored a plethora of evidence— albeit inconvenient evidence for the EPA— that shows E15 gasoline has a negative effect on engines. I introduced this legislation to ensure a decision of this magnitude will be vetted by independent scientific research, rather than political expediency.”

EPA announced its decision in January to allow the use of E15 gasoline blend in newer vehicles manufactured since 2001, but the ruling has yet to be implemented.