Advertise on Bikeforums.net



User Tag List

Results 1 to 14 of 14
  1. #1
    Junior Member
    Join Date
    Aug 2012
    Posts
    5
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Shimano brake fluid

    Yeah im gong to be bleeding my m445's soon, but the shimano mineral oil stuff is way overpriced, any one know of alternatives? on my avid elixirs i just used the normal dot fluid from the auto shop.

    UPDATE!: After some web browsing stumbled upon this! Amazing!
    http://www.peterverdone.com/archive/bikemineraloil.htm
    Worth a read if you have shimano or other mineral oil using brakes!
    Last edited by ulemon; 08-02-12 at 10:17 PM.

  2. #2
    Senior Member
    Join Date
    Jun 2012
    Posts
    207
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You can't use a DOT fluid in Shimano brakes - it'll eat the rubber seals... You need to use a pure mineral oil of the same consistency as the Shimano product. I've heard of people using 'Johnson & Johnson' baby oil and being ok, but I don't know if that's truth or anecdotal. I've heard horror stories too often about non-shimano oil to try it myself.

  3. #3
    Senior Member
    Join Date
    Apr 2011
    Posts
    1,120
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Magura also uses mineral oil so maybe their brake fluid is worth a look. Some motorcycles also use mineral oil in their brake systems.

  4. #4
    Senior Member Bill Kapaun's Avatar
    Join Date
    Feb 2007
    Location
    Mid Willamette Valley, Orygun
    My Bikes
    86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
    Posts
    6,920
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    One caveat of using auto brake fluid is it dissolves paint.

  5. #5
    Senior Member
    Join Date
    Aug 2007
    Location
    Belgium
    Posts
    748
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Find a Vespa or other such scooter/moped dealer...the brakes on these often use mineral oil; at least they did in Morocco. Shimano mineral oil is way overpriced.

    -j

  6. #6
    Senior Member gforeman's Avatar
    Join Date
    Jun 2008
    Location
    Northern Virginia
    My Bikes
    Specialized Roubaix SL4 Expert, Specialized Crux Disc
    Posts
    716
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Personally, I'd just spend the $20 for the "Right Stuff" and be done with it. Doesn't seem like too much to be safe. I once switch a motorcycle I had from Dot 4 to Dot 5 Synthetic, so it would not eat paint. I ended up replacing the seals in the slave cylinder every year, so in the end it cost me a lot more.

    Just my 2 cents...
    Gary F.


    2015 Specialized Roubaix SL4 Expert
    2012 Specialized Crux Disc
    My bike page: http://www.gwfweb.com/bicycles
    Build a bike stand! http://www.gwfweb.com/bicycles/stands.html

  7. #7
    Senior Member
    Join Date
    Sep 2010
    Posts
    2,636
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by gforeman View Post
    Personally, I'd just spend the $20 for the "Right Stuff" and be done with it. Doesn't seem like too much to be safe. I once switch a motorcycle I had from Dot 4 to Dot 5 Synthetic, so it would not eat paint. I ended up replacing the seals in the slave cylinder every year, so in the end it cost me a lot more.

    Just my 2 cents...
    Agreed; you might wish you had spent the $20 if you induce a sudden brake failure during a panic stop and fail to avoid an accident. IMO brakes are too important to cut corners.

  8. #8
    Senior Member
    Join Date
    Aug 2007
    Location
    Belgium
    Posts
    748
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Shimano rebrands mineral oil (granted this is not the same mineral oil you buy at a pharmacy) and marks it up a bajillion times to prey on this very same mentality. The issue with changing one DOT fluid for another is the chemical properties are not the same. There are plenty of resources on the web discussing this as there are resources on the web that discuss what mineral oil products are suitable subtitute for the overpriced rebranded shimano stuff. Shimano wants you to believe that their oil is a magical elixir so that folks are too afraid to use anything but their brand of product. The reality is the OP was not asking for the convenient solution...he was specifically asking for an economic solution. Feeding the shimano corporate machine does nothing to help make their oil cheaper and suggesting that one do this does nothing to advance the OP or anyone in a similar situation to a more economical solution.

    I was browsing some info in my glovebox a few days ago that basically stated the following "Subaru does not recommend using anything but Genuine Subaru engine coolant in Subaru vehicles. Using anything but Genuine Subaru engine coolant can have catastrophic effects on the function of the engine." I didn't realize Subaru had cornered the market on engine coolant.

    -j

  9. #9
    Junior Member
    Join Date
    Aug 2012
    Posts
    5
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Greenfieldja View Post
    Shimano rebrands mineral oil (granted this is not the same mineral oil you buy at a pharmacy) and marks it up a bajillion times to prey on this very same mentality. The issue with changing one DOT fluid for another is the chemical properties are not the same. There are plenty of resources on the web discussing this as there are resources on the web that discuss what mineral oil products are suitable subtitute for the overpriced rebranded shimano stuff. Shimano wants you to believe that their oil is a magical elixir so that folks are too afraid to use anything but their brand of product. The reality is the OP was not asking for the convenient solution...he was specifically asking for an economic solution. Feeding the shimano corporate machine does nothing to help make their oil cheaper and suggesting that one do this does nothing to advance the OP or anyone in a similar situation to a more economical solution.

    I was browsing some info in my glovebox a few days ago that basically stated the following "Subaru does not recommend using anything but Genuine Subaru engine coolant in Subaru vehicles. Using anything but Genuine Subaru engine coolant can have catastrophic effects on the function of the engine." I didn't realize Subaru had cornered the market on engine coolant.

    -j
    Right on, but it seems like I'm gonna have to buy genuene for now, until some suggests another better option (don't want to buy Johnsons baby oil).
    Yes the point I was trying to make was you could use non genuine dot fluids with the various avid brakes, but had to use genuine mineral oil with shimano

  10. #10
    Senior Member gforeman's Avatar
    Join Date
    Jun 2008
    Location
    Northern Virginia
    My Bikes
    Specialized Roubaix SL4 Expert, Specialized Crux Disc
    Posts
    716
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You never know what the manufacturer is doing to their branded products. Put anything other than Honda ATF in your Honda car, and you will regret it. Do NOT ask me how I know
    Gary F.


    2015 Specialized Roubaix SL4 Expert
    2012 Specialized Crux Disc
    My bike page: http://www.gwfweb.com/bicycles
    Build a bike stand! http://www.gwfweb.com/bicycles/stands.html

  11. #11
    Junior Member
    Join Date
    Aug 2012
    Posts
    5
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by gforeman View Post
    You never know what the manufacturer is doing to their branded products. Put anything other than Honda ATF in your Honda car, and you will regret it. Do NOT ask me how I know
    Very true, but btw I did research and you should look at the link in my first post.
    I know you said dont ask, but... how do you know?

  12. #12
    Senior Member gforeman's Avatar
    Join Date
    Jun 2008
    Location
    Northern Virginia
    My Bikes
    Specialized Roubaix SL4 Expert, Specialized Crux Disc
    Posts
    716
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ulemon View Post
    Very true, but btw I did research and you should look at the link in my first post.
    I know you said dont ask, but... how do you know?
    I picked up some ATF fluid at Autozone and changed it in a 91 Accord years ago. It started shifting so bad I thought the tranny was gone. I had to drain it and refill 3 times to get all the Autozone stuff out, and it finally worked again. Never again will I try to save a few bucks on something like this.
    Gary F.


    2015 Specialized Roubaix SL4 Expert
    2012 Specialized Crux Disc
    My bike page: http://www.gwfweb.com/bicycles
    Build a bike stand! http://www.gwfweb.com/bicycles/stands.html

  13. #13
    Senior Member okane's Avatar
    Join Date
    May 2009
    Posts
    387
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Asked my mechanic about draining./flushing coolant on my Toyota Sienna and he said I would need to get coolant at Toyota dealer, he doesn't stock it. He said not good to use anything else. He at least must believe it because the shop doesn't usually want you to bring parts for them to install! Maybe I'm a sucker, but with something like brakes, I doesn't seem to be worth the risk, at least until we know more.

  14. #14
    Senior Member Matt Gaunt's Avatar
    Join Date
    Oct 2004
    Location
    London, UK
    Posts
    2,217
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Bill Kapaun View Post
    One caveat of using auto brake fluid is it dissolves paint.
    True, but this is almost always a DOT [x] product which the OP can't use anyway (it literally will eat the seals away and Shimano specifically warns about this).
    Matt
    2010 Kinesis Decade Convert2 Alloy fixie, Miche, Sora Pics soon...
    2008 Kinesis RC2 Scandium/Carbon Road, Ultegra, Ksyrium Elites Pics
    2007 Kinesis Pha5e Scandium hardtail, XT, Revelations, Rockets, M4s, Mavics Pics
    2005 Kinesis RC Scandium/Carbon Road, Ultegra, Ksyrium SLs Pics
    1996 Raleigh Max Steel, Deore XT, SRAM Attack shifters, homemade wheels Pics

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •