I believe that they made the "butter" out of the leftovers (paraffin) from making liquid fuel out of the coal. So, its not a straight 60:1 ratio, you'd need to

I believe that they made the "butter" out of the leftovers (paraffin) from making liquid fuel out of the coal. So, its not a straight 60:1 ratio, you'd need to add some more products to the equation.