It's very easy. All you need to do is buy an antifreeze tester at any of your local auto parts stores - it'll cost just a couple bucks. Simply fill the tester with fluid from the radiator or overflow reservoir and it will tell you at what temperature the antifreeze will freeze and boil. A great rule of thumb is to just change your antifreeze at least once every two years. On average, women reported changing their antifreeze three times in the last three years compared with 2.5 changes reported by men.
Young adults change their antifreeze more often than older adults.
About 35 percent of women reported changing their own antifreeze. About 60 percent of antifreeze buyers report disposing of their old antifreeze by recycling. Buyers overwhelmingly report making their purchases at auto supply stores and discount department stores. Some 48 percent of respondents said they made their last purchase at an auto supply store and 31 percent bought it at a discount department store. Read more Valvoline stories.