At French Broad Rafting Expeditions we continue to upgrade our blend of Biodiesel fuel. When Biodiesel is put into older vehicles it is suggested that you start with a 50% vegetable oil and 50% diesel blend. Since 2007 FBRE has been using Biodiesel that we get delivered from Blue Ridge Biofuels http://www.blueridgebiofuels.com/. We have worked our way up to 90% vegetable oil blend in all of our diesel vehicles. Our Guests frequently mention the fact that the fumes from the buses make them hungry, since it smells like french fries.