Update - December 2010

In light of recent research published by the Department of Energy (DOE) and the National Renewable Energy Laboratory (NREL), UL is confirming our previous statements regarding the use of existing dispensing systems with greater than E10 ethanol blends. Fuel dispensers certified under UL Standard 87 are certified for use with gasoline and ethanol blends up to E10 at a maximum.

Research has shown that there are some issues with legacy equipment exposed to higher ethanol fuel blends. Of particular concern is the degradation of gaskets, seals, and hoses which can occur when these elastomers are exposed to greater than E10 ethanol blends. Breakdown of these components can cause leaks. Therefore, use of greater than E10 ethanol blends in these dispensers is contra-indicated.

Determinations of fuel compatibility and warranty are made only by the manufacturer and users with questions about the compatibility of their pump should contact the manufacturer.

UL is prepared to support industry and government with the analysis of the research in support of their seeking solutions on this matter and in support of America's drive for energy security.

In situations where E15 is to be dispensed, UL recommends the use of new, listed equipment designed and identified for use with mid-level blends. There are currently dispensing units on the market listed for use with blends up to E25 under UL Standard UL 87A-E25.