Biodiesel Fuel Raises Hopes of Greening Cars
Published: February 18, 2007
AS a cardiologist, Jonathan Sackner-Bernstein recognized the familiar signs: an excess of saturated fat had restricted flow and made movement impossible. But the patient in question was his Volkswagen Jetta, which he had filled the day before with biodiesel fuel consisting largely of rendered animal fat. Plummeting overnight temperatures had caused the fat to congeal, and the result was a clogged engine and a stalled car.
http://www.nytimes.com/2007/02/18/nyregion/nyregionspecial2/18Rbiodiesel.html?ref=science