Energy use is decreasing while yield per bushel climbs.
In 1975, it took 50,000 Btu to make a gallon of ethanol. In 2007, ICM guaranteed its process to use less than 32,000 Btu. And, yields were up as well. We're now squeezing out 2.8 gallons of denatured ethanol per bushel of #2 Yellow Dent corn, compared to the industry average of 2 gallons in 1980.