Biodiesel is a renewable, liquid fuel for use in diesel engines. Typically biodiesel is blended with petroleum-based diesel at various ratios depending on the requirements of the fuel technology utilizing the blend. Biodiesel serves as a cleaner replacement for traditional diesel, is biodegradable, and can be manufactured domestically from vegetable oils, animal fats, or recycled restaurant grease. Review the resources below from the Alternative Fuels Data Center (AFDC) to learn more.