Rochester, New York – A new study indicates that the use of E20 fuel, a blend of 20 per cent ethanol with gasoline, better reduces tailpipe emissions than E10 or traditional gasoline with no measurable effect on driveability or maintenance.
The study was conducted by the Center for Integrated Manufacturing Studies at the Rochester Institute of Technology in Rochester, New York.
The data illustrates the potential benefits of E20 as a tool in reducing overall vehicle emissions at a time when many states and the U.S. Department of Transportation are considering policies that would increase the ethanol percentage in standard gasoline.
“Currently, numerous commercially-available gasoline brands contain 10 per cent ethanol,” said Brian Hilton, senior staff engineer and a member of the research team. “There have been concerns raised that any increase in blend would negatively impact standard internal combustion engines. However, our data shows that vehicle performance remained constant, while carbon monoxide and hydrocarbon emissions were decreased even over E10 blends.”
The team worked with the County of Monroe, New York to test the use of E20 in ten older gasoline vehicles that were not designed for ethanol fuel mixtures. The vehicles, used as service vehicles by the county, logged over 160,000 km on E20 fuel and were analyzed periodically for emissions and for overall wear and tear. The fleet showed an average emissions reduction of 23 per cent for carbon monoxide, and 13 per cent for hydrocarbon emissions, when compared with conventional gasoline.