I wanted to start this thread to discuss additives just for bio. I would like info on when or if it's even needed and in what concentrations. I understand that there is some new additives being made strictly for bio and I am curious if that's just for the higher concentrations such as 80% and 100%. I imagine that blends like B5 thru B20 wouldn't need a bio specific additive, but could the motor benefit from a diesel additive? Any and all comments on additives would be greatly appreciated.