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Is it okay to mix different kinds of windshield washer fluid?

nukem asked:


I just bought some rainX washer fluid. Do I have to wait for my old blue washer fluid to be used up… or can I just add the rainX washer fluid and fill it up? I just bought some rainX washer fluid. Do I have to wait for my old blue washer fluid to be used up… or can I just add the rainX washer fluid and fill it up?
If it helps, I have a 1995 Mercury Sable. Thanks!

Bradley

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This entry was posted on Thursday, August 19th, 2010 at 2:40 pm and is filed under Maintenance & Repairs. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

6 Responses to “Is it okay to mix different kinds of windshield washer fluid?”

  1. Cassidy says:
    August 19, 2010 at 5:20 pm

    Brad

    Mix them. It won’t hurt anything.

  2. Sam says:
    August 21, 2010 at 9:01 am

    Henry

    nope, doesnt hurt a thing, cuz it goes straight to the windshield. you could use water if u wanted too, just wouldnt really work well lol.. and it would freeze in the winter lol..

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  3. Sam says:
    August 22, 2010 at 4:04 am

    Cassidy

    its not gonna hurt anything, not like its coolant youre mixing. and usually directions help

  4. Bill says:
    August 22, 2010 at 4:09 am

    Louie

    I would say that yes you can mix them. Rainx has some wax to make rain fall off but will always be in the station after you used it. The only the special from washer fluid from regular windex, and water is an element to stop it from freezing. It is perfectly safe to mix them. It is more about personal preference. I do like rainX THough becuase of the rain beads.

  5. Frank says:
    August 25, 2010 at 10:09 am

    Adam

    Read the markings closely, most of these fluids are alcohol based to lower the freeze point of the mixture. Others are non-alcohol based and yet they are water-soluble. You do not get optimum performance when mixing different fluids. One of the bad effects of mixing incompatible fluids is you form more ice in your windshield.in extremely freezing mornings.

  6. Frank says:
    August 28, 2010 at 1:24 am

    Louie

    In order to get the best performance from the Rain-X, you should get rid of the blue stuff.
    The Rain-X has an additive that helps the rain to slide off the glass (a non-drying type of alcohol, I think), and the blue stuff has solvents to get oils off the glass, so if you mix the two, the Rain-X will be diluted, and the blue stuff will try to keep it from sticking to the glass at the same time.

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