Brake fluid: organic or Syn?
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Brake fluid: organic or Syn? in Past Cadillac Vehicle Discussion; I intend to do a complete brake fluid flush on my '87 Coupe. I picked up 3qt of DOT3 Prestone ...
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    Dave S Texas's Avatar
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    Brake fluid: organic or Syn?

    I intend to do a complete brake fluid flush on my '87 Coupe. I picked up 3qt of DOT3 Prestone brake fluid, but did not notice it was a Synthetic fluid.

    Any problems associated with changing to Syn or buy/use the OE organic?

    Thanks

    Dave


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    Re: Brake fluid: organic or Syn?

    nothing at all, brake fluid is brake fluid, as long as there is no air its good.


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    Submariner409's Avatar
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    Re: Brake fluid: organic or Syn?

    Brake fluid is not just "brake fluid". Do a little homework for peace of mind. (Your car was delivered with organic brake fluid installed.) Consult your owner's manual for the Cadillac specified fluid as delivered, and if you do change to a synthetic fluid, perform a complete system flush/exchange.

    Does the new synthetic Prestone label specifically say it's compatible with other DOT3 fluids ? If so, you should be good to go.

    You'll need to scroll up/down a tad in this tutorial to find "Brake Fluid".

    http://books.google.com/books?id=5rW...rganic&f=false

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    04GrandAmGT's Avatar
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    Re: Brake fluid: organic or Syn?

    Quote Originally Posted by Submariner409 View Post
    Brake fluid is not just "brake fluid". Do a little homework for peace of mind. (Your car was delivered with organic brake fluid installed.) Consult your owner's manual for the Cadillac specified fluid as delivered, and if you do change to a synthetic fluid, perform a complete system flush/exchange.

    Does the new synthetic Prestone label specifically say it's compatible with other DOT3 fluids ? If so, you should be good to go.

    You'll need to scroll up/down a tad in this tutorial to find "Brake Fluid".

    http://books.google.com/books?id=5rW...rganic&f=false
    He Said a complete Flush, Dot 3 Is Dot 3, thats like going from 10w30 conventional to 10w30 synthetic.


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    MoistCabbage's Avatar
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    All DOT 3 brake fluid is synthetic. It's not a mineral oil based fluid, it's glycol-ether.

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    Re: Brake fluid: organic or Syn?

    if your just adding i dont recommend it but if a complete flush is done, you would be able to.

    ----------

    Quote Originally Posted by MoistCabbage View Post
    All DOT 3 brake fluid is synthetic. It's not a mineral oil based fluid.
    Really? cool learn new things every day.


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    Dave S Texas's Avatar
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    Re: Brake fluid: organic or Syn?

    ok, thanks for the responses. I was pert sure it would be ok, but the horrors changing from organic to syn motor oil gave me pause.
    I appreciate the help.

    Dave

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    MoistCabbage's Avatar
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    Ummm, there are no horrors in switching to/from/back and forth between conventional and synthetic motor oil. They're 100% compatible, hence synthetic blend oils.

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    Dave S Texas's Avatar
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    Re: Brake fluid: organic or Syn?

    Quote Originally Posted by MoistCabbage View Post
    Ummm, there are no horrors in switching to/from/back and forth between conventional and synthetic motor oil. They're 100% compatible, hence synthetic blend oils.
    I'm sure you are vastly more experienced than I, but I experienced them when changing to syn in my truck. Had to change every engine oil gasket to the neoprene type.

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    MoistCabbage's Avatar
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    You mean the 33 year old truck in your profile developed an oil leak? Gasp!



    There's an explanation for that. Synthetics have a higher detergent level. There's a chance that they'll clean engine deposits from around compromised gaskets, and create/worsen leaks that were technically already there. Just being masked by a sort of natural stop leak.

  12. #11
    SGWORLDWIDE Guest
    Quote Originally Posted by Dave S Texas View Post
    I intend to do a complete brake fluid flush on my '87 Coupe. I picked up 3qt of DOT3 Prestone brake fluid, but did not notice it was a Synthetic fluid.

    Any problems associated with changing to Syn or buy/use the OE organic?

    Thanks

    Dave
    Prestone is fine I use noting but prestone brake, steering, and Dex cool

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