California Certification Fuel Development

This page last reviewed June 28, 2011


The California Air Resources Board is currently in the process of developing a new certification fuel that closely resembles in-use fuel. The current certification fuel contains MTBE, which has been banned in California gasoline since December 31, 2003.  The proposed certification fuel will contain 10 volume percent ethanol (E10).  This page contains information related  to the development of the certification fuel.



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