Same here, but our winters are pretty mild. My GPs are almost gone and I sometimes use a little ether to crank ol' LuLuBelle( , and I get the prettiest white / blue/black smoke this side of a mesquite fired BBQ! ).
If she runs good, then great. But if shes losing coolant: watch out, you may hydrolock at highway speed and cause a nasty a wreck. Just my 2 cents.