If your diesel engine is sounding noisy on straight D2, it's because it should, that's built into the design, and the motor was designed from the get go to run on the most common diesel fuel available, good old D2, not designer or boutique "greenie" fuel made out of animal fat or vegetable or plant oils from farmers or ranchers.
It is true, however, with newer Bosch HPFP's that a smidgeon of this biodiesel, 1/2% up to 2% does help tremendously with the wear scar factor of the diesel fuel on your precious and fragile Bosch CP4.X High Pressure Fuel Pump.