does anyone use 100LL av gas ?

How is it for starting in sub zero?
Do the additives raise vapor pressure?
Modern auto gas presumes fuel injection, and with a carb, I have to pump a few shots and wait 30 seconds for the gas to vaporize when it's sub zero.
Anyone else run into low vapor pressure problems on the very coldest winter nights with a carbuereted eng and modern pump gas? It didn't usta be like this.

It's not a "problem" , it's just damned annoying.