National 2010-2011 Survey of E85: CRC Project E-85-2

Teresa Alleman

Research output: NRELTechnical Report


This study examined the quality of E85 fuel around the country in each of the three volatility classes identified in ASTM D5798-10. Samples were collected from pumps in 21 states between July 2010 and May 2011, with almost 40 samples collected in each class. Parameters tested to assess fuel quality were volatility, ethanol content, water content, acidity, pHe, inorganic chloride and sulfate, andtotal sulfate. Class 1 samples more often met the volatility specification than samples from other classes, with 67% of the samples collected in this study meeting the specification. Samples in Classes 2 and 3 met the applicable volatility specifications on 43% and 30% of the time, respectively. Compliance with the ethanol specification was almost 90% in all three volatility classes, asignificant improvement over previous surveys. Several samples that would have been off-specification for ethanol content under previous versions of the specification now met the specification with the reduction in ethanol content for all classes. A few samples were off-specification for pHe, acidity, water, and inorganic chloride. Few samples were off-specification for more than one property,and samples that were off-specification in one volatility class were not necessarily off-specification in the other two classes.
Original languageAmerican English
Number of pages38
StatePublished - 2011

NREL Publication Number

  • NREL/TP-5400-52905


  • ASTM D5798-10
  • ASTM specifications
  • blender pumps
  • ethanol
  • flex fuel
  • gasoline
  • vehicle fuel


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