More than a decade ago, Joshua Tickell embarked on a nationwide tour with his ‘Veggie Van,’ fueling it with biodiesel for a total of about 25,000 miles of crisscrossing the country over a couple of years. How Tickell sourced his biodiesel was a story in itself and yielded much media attention; through a memorably DIY arrangement, he gathered free used fryer grease from fast-food franchises along the way and prepared biodiesel, a small batch at a time, with equipment he’d devised.