If you Google diesel fuel additives tests, for lubricity 2% bio fuel is the best.
I got my HD licence in 1973 and have worked on engines all my life, I put an antigell in my loader, this fall as I use it rarely and it was full of summer fuel.
You do not want the water in the fuel system, to dissipate and go threw the injection system. That is what many additives do, and the water will destroy a fuel system. Ford 's new 6.7's have a problem with their filtration system that allows water threw, and it destroys the complete High Pressure side of the system. It is not covered under warranty, and talking to a dealer representative the bill is $12,500 in Canada. You want the water to be trapped in the fuel filter.
If you are able drain it, also most fuel tanks have a drain. Fuel filters are cheap replace them. After use if posible refill the tank it will cut down on condensation.