this is what concerns me:

This Bryant Park Project piece sheds a bunch of doubt on my road trip plans: now that gas is topping $4/gallon, used oil from restaurants is nearly as hot of an item. Not only are new greasy corporations signing contracts with most chain retaurants to collect and purify their grease for biodiesel, but there are grease-stealing rings already cutting into those corporations’ profits. I’m not sure where I’d fit into this new oil economy, but I guess I’m still optimistic about the small diners of the heartland.