Giving your car a good wax before winter hits is essential for keeping your car in mint condition in bleak mid-winter. Beware: not all waxes are created equal. Consumer Reports put nearly twenty waxes to the test, and only two of them stood the test of time. The rest of the waxes began deteriorating inside of a month. The Consumer Reports test concluded that Nu Finish NF-76 and 3M One Step Cleaner Wax were the best brands. That being said, you may want to do your research, as auto forums are full of differing opinions on the ideal winter wax.