Stock Fluid: DOT3 or DOT4
Close
Login to Your Account
Kia Forte Turbo Forum - Powered by vBulletin

Stock Fluid: DOT3 or DOT4

This is a discussion on Stock Fluid: DOT3 or DOT4 within the Kia Forte Forte Brakes forums, part of the Kia Forte Turbo Garage category; Does anyone know what the stock brake fluid in our cars is? The reservoir cap doesn't specify, and the manual only says DOT3 (FMVSS116) or ...

Results 1 to 9 of 9

Thread: Stock Fluid: DOT3 or DOT4

  1. #1
    Senior Member staax's Avatar
    Member #
    332
    Join Date
    Sep 2015
    Location
    Ottawa, Ontario
    Posts
    633
    Thanked
    204 times
    Member #
    332
    Liked
    204 times

    Stock Fluid: DOT3 or DOT4

    Does anyone know what the stock brake fluid in our cars is?

    The reservoir cap doesn't specify, and the manual only says DOT3 (FMVSS116) or DOT4 is to be used.

    Now I know that DOT5 shouldn't be mixed with either, but I also thought it wasn't a good idea to mix DOT3 & DOT4 together.
    2016 Forte5 6MT Snow White Pearl

  2. #2
    PLP
    PLP is offline
    Senior Member PLP's Avatar
    Member #
    433
    Join Date
    Mar 2016
    Location
    Haslett, MI
    Posts
    1,674
    Thanked
    332 times
    Member #
    433
    Liked
    332 times
    DOT3 and DOT4 can be mixed no problem.
    Depending on your approach, but mine is like this.
    Fresher DOT3 is still better than old DOT4.

    3 and 4 differ only by a several degrees on dry and wet boiling point. We are still far away from reaching those (in regular and spirited driving). Hence, DOT3 will do.

  3. #3
    Senior Member staax's Avatar
    Member #
    332
    Join Date
    Sep 2015
    Location
    Ottawa, Ontario
    Posts
    633
    Thanked
    204 times
    Member #
    332
    Liked
    204 times
    Yeah you're right.. I knew DOT3 and DOT4 COULD be mixed, just didn't thing it was the best idea but apparently it doesn't matter. DOT5 you certainly shouldnt mix.

    I have an unopened bottle of DOT3 in my garage and I'll use that... Just curious to know what is in there from the factory. So if anyone knows, please share.

    This is actually the first car I've seen that doesn't say DOT3 or DOT4 only on the cap.

  4. Remove Advertisements
    ForteTurbo.org
    Advertisements
     

  5. #4
    PLP
    PLP is offline
    Senior Member PLP's Avatar
    Member #
    433
    Join Date
    Mar 2016
    Location
    Haslett, MI
    Posts
    1,674
    Thanked
    332 times
    Member #
    433
    Liked
    332 times
    Quote Originally Posted by staax View Post
    Just curious to know what is in there from the factory. So if anyone knows, please share.
    Manual does NOT specify what they used besides what to use: that is DOT 3 or DOT 4. I guess you could mix them with DOT 5.1 as all of them are the same chemistry (glycol based).

    Problem with DOT 5 is that this one was made based on silicone... it supposedly be better, but it seems it was too expensive for "normal cars". As far as I know only Army uses it. The good thing is that silicone does NOT absorb moisture, hence does not have to be flushed. Basically life fill. It has been known since way before 2000, but again - very expensive to use.
    One thing though - you must not use silicone brake fluid in system that was already filled with glycol. It will create issues.
    There was also something about ABS systems and silicone, but I do not remember what the case was about.


    EDIT:
    I take back the price. I just checked and they are not so much more expensive than DOT 4. However, there is a problem with bleeding the system. Silicone is not easy to be bled as it absorbs more air than glycol based ones. Hence, it cannot be used in ABS system. Therefore, not used in nowadays cars...
    Last edited by PLP; 08-19-2016 at 02:39 PM. Reason: price, ABS

  6. #5
    Senior Member
    Member #
    289
    Join Date
    Jul 2015
    Posts
    827
    Thanked
    202 times
    Member #
    289
    Liked
    202 times
    Are you changing your brake fluid? There would be no particular reason to mix old DOT4 with DOT 3. Brake fluid is CHEAP for the work it does. Use DOT 4 synthetic - one of the most important things about DOT4 synthetic is that is resists water creeping in and contaminating and weakening the brake fluid. Stays nice and clean for a long time.
    I cringe when I see black brake fluid in someone's car.

  7. #6
    Senior Member staax's Avatar
    Member #
    332
    Join Date
    Sep 2015
    Location
    Ottawa, Ontario
    Posts
    633
    Thanked
    204 times
    Member #
    332
    Liked
    204 times
    Doing the clutch line mod, just need it to top up. I'll be using DOT3.
    2016 Forte5 6MT Snow White Pearl

  8. #7
    Senior Member
    Member #
    289
    Join Date
    Jul 2015
    Posts
    827
    Thanked
    202 times
    Member #
    289
    Liked
    202 times
    WEll snap up some photos and/or video and keep everyone posted.
    Last edited by valleyracer; 08-22-2016 at 09:50 PM. Reason: fix sentence

  9. #8
    PLP
    PLP is offline
    Senior Member PLP's Avatar
    Member #
    433
    Join Date
    Mar 2016
    Location
    Haslett, MI
    Posts
    1,674
    Thanked
    332 times
    Member #
    433
    Liked
    332 times
    Quote Originally Posted by valleyracer View Post
    Use DOT 4 synthetic - one of the most important things about DOT4 synthetic is that is resists water creeping in and contaminating and weakening the brake fluid. Stays nice and clean for a long time.
    I cringe when I see black brake fluid in someone's car.
    I hate dark brake fluid as well. Everytime I flush the system the pedal seems so easy to push, not so stiff as it gets overtime.

    However, could you elaborate on synthetic DOT 4? DOT 3, 4, and 5.1 are basically same composition with small difference in inhibitors and there is not much room for being "synthetic" in its essential meaning. They are based on mixture of glycol ethers with a mix of borate esters according to generic SDS.
    Hence, calling it synthetic is like calling well water organic...

  10. #9
    Senior Member
    Member #
    289
    Join Date
    Jul 2015
    Posts
    827
    Thanked
    202 times
    Member #
    289
    Liked
    202 times
    Synthetic is a misnomer in this case. It's not lemon and honey! Synthetic means that the chemists have specifically arranged a product to behave in a certain way. Or more to the point, today's brake fluid isn't as "corruptible" as older brake fluid that was hygroscopic and boiled easily thru heat transmitted thru the calipers, pads and lines.
    Dot 5 is generally silicone based for heavy race applications. Dot 3 and Dot 4 differ (sometimes greatly) wherein the atmospheric boiling point of a GOOD Dot 4 fluid can be above 450 degrees. I stick with Prestone Dot4 exclusively, as opposed to WalMart or Kragen's brake fluid. My SRT4 ACR and 99 NEON RT were VERY EASY to change the brake fluid on, and I used DOt4 for both, with the fluid staying clean and the pedal firm for about 3 years between flushes.
    With these newer brake systems (ABS + distribution + traction control etc) I'll bet there are very specific procedures on changing the brake fluid, but I'd still stick with DOT4.

Home | Forum | Active Topics | What's New

Remove Ads

Sponsors

Posting Permissions

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

Similar Threads

  1. DIY: 1.6T Transmission Fluid Change
    By honhon in forum Kia Forte Turbo DIY Section
    Replies: 21
    Last Post: 01-29-2017, 03:00 PM
  2. ATF Fluid change?
    By santiad in forum Kia Forte Turbo Maintenance
    Replies: 5
    Last Post: 07-20-2016, 05:41 AM
  3. Stock Downpipe
    By lephoenix in forum Kia Forte Turbo Performance
    Replies: 8
    Last Post: 08-25-2015, 06:20 PM
  4. Stock audio
    By kennyCuz in forum Kia Forte Turbo Discussions
    Replies: 18
    Last Post: 07-20-2015, 01:10 PM
  5. DIY: 1.6T Transmission Fluid Change
    By honhon in forum Kia Forte Turbo Maintenance
    Replies: 4
    Last Post: 12-02-2014, 07:14 AM

Search tags for this page

2010 kia forte ex brake fluid

,

2011 kia forte koup brake fluid

,

2011 kia forte lx brake fluid dot 3 or 4

,

2012 kia forte brake fluid type

,

2015 kia forte 5 brak fluid

,

brake fluid 2010 kia forte

,

brake fluid for kia dot 3

,

brake fluid for kia forte

,

dot3 brake fluid kia forte5

,

kia forte brake fluid forum

Click on a term to search our site for related topics.