There is a BASF ad in the most recent Popular Science that shows an ear of corn with the caption "48 Miles Per Kernel".
I find it hard to believe. How much ethanol can one kernel produce?

Suppose they were talking about a car that gets 48mpg, and suppose we give them the benifit of the doubt and they were talking about E10 gas. That is still .1 gallons per kernel. or 12.8 fluid ounces per kernel. It seems to violate conservaton of mass.

It gets worse with lower MPG cars or higher percentages of ethanol gasoline.

Or were they thinking of converting matter directly to energy?