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Thread: DOT 5 brake fluid

  1. #1
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    Default DOT 5 brake fluid

    Hi all,

    Anyone has an opinion about DOT 5 braking fluid in a Mazda 3 GT 2014 ? Is this a Good/Bad idea ?

    Thanks
    Eric

  2. #2
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    Do not touch the Dot-5 brake fluid. It is silicone-based and would ruin the brake system of any car that has ABS. Dot 5 fluid is best suited for older (vintage) British type performance cars.

    Also Dot 5 brake fluid is hydrophobic, and not hygroscopic (as with other types e.g. Dot 3 or Dot 4). i.e. Dot 5 fluid will not mix with water, whereas Dot 3 or Dot 4 will readily absorb water.

    For your Mazda 3, you can use a good quality Dot 4, (it can replace the factory Dot3 in your system). But generally, Dot 4 fluid must be changed more often than Dot 3, which means at least an annual flush and fill. ATE, Motul, are popular brands. Motul is higher performance but is expensive. ATE is better value.

  3. #3
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    Thanks for the info !

    I guess I'll go to Perry and buy some Motul. Not sure how much I need for my Mazda 3 GT 2014. I'll ask them !

  4. #4
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    Perry's also carries PBR BR600. Similar to Motul, but less expensive.

    Motul and PBR come in 500ml bottles

    ATE comes in 1 Litre cans.

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