As far as I can tell, compared to diesel, it's (roughly) 10% more expensive for 90% of the energy per gallon.
In addition, the hack forgot to include the additional energy cost of hauling around the less efficient fuel, not to mention additional stops for refueling.
Taxes? I doubt that they are on a BTU or other energy scale, so add that addition cost in too.
About the same as the ethanol in gasoline scam.