B100 will gel sooner. I am currently seeing temps in the high 30s low 40s in the morning here now. I have had no issues so far. I am getting ready to start blending with Kero. I have a bunch of mason jars that will hold different blends so I can see how the temps effect them. How low the bio can go before it clouds is depends on what stock it is made from. I am using soy and canola (2 of the best to start with). From what I have heard the treatments don't work as well with bio.

Kevin