Originally Posted by dsldrvr
Not Completely true, there are ASTM standards developed for everything up to B100.
Not quite the way I see it.
The standard, ASTM D6751-07b, is for BD meant to be blended with Petro diesel.
Diesel engines in use today and those still being produced were engineered to work on fuel conforming with long existing standard for Diesel fuel and its current update ASTM D975-07b. B5 Diesel has always met the existing Diesel standard and so it was accepted by the EMA and its' members.
Until sufficient testing has been done to show current engines can run safely on blends over B5 you can expect the waranting parties (that is the auto/truck/equipment makers) to hold the line at B5.
There is hope some have begun to allow B20 at this time