[M.D. Holloway]

Diesel fuels can be blended with up to 5% Biodiesel without having to state it. Biodiesel reacts poorly with water and has a lower level of tolerance for water contaminations. These fuels are more susceptible to microbial growth problems, especially when water is present. Diesel fuels created from non-petroleum sources have a shorter storage stability life. These fuels do not perform as well as mineral oil refined diesel fuel in cold temperatures and have a higher gelling point. Biodiesel fuels can also contribute to varnishing of fuel systems.
Biodiesel performs comparably to regular diesel, with slightly less energy per gallon when blended into petroleum diesel fuel.