Please clarify different diesel fuels ( USA Market)

[Quicksilver]

What's the difference between B5 bio diesel blend and regular diesel fuels.
Both BMW and MBZ will be featuring Diesel vehicles in the near future.

MBZ requires B5 bio diesel blend. What fuel will BMW require and what is the avaliability of B5 bio diesel blend fuel in different states?

[motordavid]

QwkAg...
from a cursory pull off the net: some good info links.

Diesel fuel grades:
http://www.dieselnet.com/standards/us/fuel.html

Biodiesel short spec/lack of spec info:
http://www.dieselnet.com/standards/u..._biodiesel.php

B5 and other mixtures of biodiesel:
http://www.fueleconomy.gov/feg/biodiesel.shtml

[JCL]

Originally Posted by Quicksilver

MBZ requires B5 bio diesel blend. What fuel will BMW require and what is the avaliability of B5 bio diesel blend fuel in different states?

I don't believe that MB requires B5, they tolerate it. All part of being green

From MB web source:

Mercedes-Benz USA now approves the use of B5 bio diesel (standard diesel with a maximum 5% bio diesel content) in all Common Rail Injection Diesel "CDI-engines." As bio-diesel can be refined from a variety of raw materials resulting in widely varying properties, the only approved bio diesel content is one that meets ASTM D6751 specification and that has additionally the necessary oxidation stability (min. 6H, proved with EN14112 method) to prevent damages to the system from deposits and/or corrosion. Please ask your service station for further information. If the B5 bio diesel blend is not sufficiently labeled to clearly indicate that it meets the above standards, please do not use it.

As MD notes above, B5 isn't a standard, it is blend % indicating base stock source. Standards come from ASTM and SAE, not special interest groups.