According to New Holland, here are some things about biodiesel that one should consider.
A. Buy biodiesel that meets the North American fuel standard ASTM D6751.
B. Biodiesel will actually attract water vapors out of the air. Fuel tanks should be kept as full as possible to limit the amount of air and water vapors in them.
C. Check the engine oil dipstick daily to ensure that the biodiesel has not deteriorated the fuel pump seals. This would allow fuel into the engine sump.
D. Due to potential stability problems with biodiesel, the fuel should not be stored in on-site storage tanks for more than 3 months. If it is, this then should not be used as fuel for a diesel engine.