The government rates the fuel economy of flex-fuel vehicles at about 165% the miles per gallon (mpg) they would get on straight petrol.

ECONOMIST: Behind Detroit's sudden embrace of ethanol

Finally, a measure in the bill would require the administration to raise corporate average fuel economy (CAFE) standards from their current level of 25 miles per gallon (mpg) to 35 mpg by 2020.

FORBES: Magazine Article

They support a weaker proposal than the one put forth in the Senate's version of the energy bill, which would raise the standard from 25 miles per gallon to 35 mpg by 2020.

FORBES: Magazine Article

Under the new legislation, the fleetwide standard will be raised to an average of 35 miles per gallon by 2020, up from 25 mpg today.

FORBES: Magazine Article

First, it increases vehicle fuel efficiency to a fleetwide average of 35 miles per gallon by 2020, up from the current level of 25 mpg.

FORBES: Magazine Article