Now that gas contain 10% ethenol is it necessary to add a dry gas during cold weather?
No.
No.
No.
Not.
You never did need to add it every time.
No, that 10% will absorb any and all condenstaion you may have in your tank!
It’s not necessary. As stated, the 10% ethanol is enough to stop water molecules from associating with each other and creating ice crystals.