My oil company has suggested putting anti-freeze in my boiler to avoid
the possibility of freeze-ups.
It sounds like a good idea, but I was wondering if anyone has ever
done it and how did it work??

Specifically, does your system heat the same??
That is, does your home get warm as fast, and do you use the same
amount of oil/gas/whatever with anti-freeze as with water??

Anyone have any real life direct actual experience with this??

Thanks!