On March 29, 2017, the Urban Air Initiative (UAI) released a statement claiming that the Coordinating Research Council’s (CRC) study on fuel emissions was biased and flawed.  According to UAI, the match blending of test fuels in the study fails to recognize the performance of ethanol in real world fuels, including improving fuel quality and reducing toxic tailpipe emissions.  UAI stated that performing match blending in a lab using a custom test fuel rather than real world fuel discredits the study, and the inaccurate data would likely lead EPA to continue to limit the use of higher ethanol blends.  To encourage the development of more accurate information, UAI is working on a guidance document to assist researchers to better understand the changes in fuel properties when evaluating ethanol and emissions to ensure that lab test fuels match the fuels in use.

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