One thing I have noticed is that all commercial biodiesel is the same. I began using B100 in May and I did notice a slight power loss. A few months later my supplier changed their source. The B100 that I purchase from them now is better (power seems very close to that of petroleum diesel) and definitely cleaner. I question if every 'commercial' supplier is making biodiesel to the ASTM 6751-02 standard and even if everyone is making it to that standard I believe that you still have differences in 'power' per unit and cleanliness.

I can not speak to the B100 when comparing turbo to non-turbo usage as both of my Mercs are turbo.

I hope things improve for you.