If your pump gas is 10% ethanol and costs $2.50 a gallon... every time you put 10 gallons in your tank, you are putting 1 gallon of alcohol in at a cost of $2.50... Gas Dry is around $2.50 for 10 ounces... you really don't need to add any more to your fuel... If you want you can buy a bottle of 91% rubbing alcohol for about $1 a quart and add that to non ethanol fuel...
Adding alcohol to ice will not melt it, it combines with any water and prevents it's freezing. The original engine antifreeze was alcohol and had to be replaced throughout the winter because it evaporated from heat... another BIG improvement through chemistry = modern antifreezes... KennyV.