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Energy Tomorrow Blog

e8534  renewable-fuel-standard  ethanol  fuel-economy  fuel-demand  consumers  epa34 

Mark Green

Mark Green
Posted July 18, 2014

Check out our new cartoon, which pokes fun at what actually is pretty big drawback with E85, the fuel containing up to 85 percent ethanol that some think is key to salvaging the flawed Renewable Fuel Standard (RFS).   

Sure, it’s a cartoon. But it helps illustrate a real dilemma with E85 – its significant fuel economy disadvantage compared to the E10 fuel that’s the staple of the U.S. fuel supply.

Basically, because ethanol is less energy-dense than gasoline, fuel that’s up to 85 percent ethanol gets fewer miles per gallon than fuel that’s only 10 percent ethanol. Here’s a sample search from the Energy Department’s fuel economy comparison tool, which shows this in specific vehicle types – fewer mpg with E85, higher average annual fuel costs. 

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rfs34  renewable-fuel-standard  e8534  ethanol  gasoline  epa34  carbon-emissions  fuel-economy  blend-wall 

Bob Greco

Bob Greco
Posted June 18, 2014

Almost half of 2014 is behind us, and yet EPA still hasn’t finalized the ethanol requirements for this year. This is not a recipe for predictability and reliability in the gasoline markets, and the administration’s inability to meet the congressionally-mandated deadline of November 30th is a clear example of how unworkable the RFS is.

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