Biodiesel fuel is a type of diesel fuel made from soy or reprocessed vegetable and/or animal cooking oils. Pure biodiesel contains no petro-diesel and is known as B100 or simply biodiesel. Biodiesel blends refer to a mixture of biodiesel and petro-diesel with the number after the B referring to the percentage of biodiesel. For example, a B2 fuel contains 2% biodiesel and 98% petro-diesel. B20 contains 20% biodiesel and 80% petro-diesel. Biodiesel immediately and seamlessly transforms a diesel fleet into a cleaner-burning, alternatively fueled fleet without added investment in infrastructure. However, cold-weather operational problems have limited its use during winter months. Power Service Arctic Express® Biodiesel Antigel eliminates the cold-weather operational problems associated with the use of diesel fuels containing up to 20 percent biodiesel (B20).