Here’s an interesting biodiesel stat:
[T]he region’s supply of fryer grease is limited. Each Oregonian contributes about a gallon of used cooking oil a year to the grease market. [Emphasis added.]
That’s really not much grease — especially considering that Oregon residents consume about a gallon and a half of highway fuels per person each day. So as much as I love biodiesel, fryer grease just isn’t going to power rush hour.