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  1. #1
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    TRPLXL2's Avatar
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    Default Synthetic or Regular Brake Fluid?

    My dad has a 32 Ford that he bought last year, and the car came up from Florida from an auction we bought it from. There was no paper work for it at all, and what we were wondering was is there a way to tell what kind of brake fluid is in the car right now? He just doesn't want to take the chance of adding a different kind to top it off, and end up with the Dual Master Cylinder getting messed up. A guy at the Goodguy's show last year from Wilwood told us that if you mix synthetic with regular brake fluid, it could cause a chemical reaction and cause the brake fluid to thicken/gel up in the lines and possibly eat the rubber gaskets and o-rings. If anyone has any little tricks to find out if it's synthetic or regular brake fluid please help, thanks in advance for any tips.............AMYhttp://www.gmtruckclub.com/forum/attachment.php?attachmentid=2170&stc=1&d=123679665 6
    Last edited by TRPLXL2; 09-29-2009 at 08:09 PM.
    2004 Chevy Colorado
    LS1 5.7 swap/TBSS rear axle swap

  2. #2

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    Why not remove all the fluid from the master and fill it up with synthetic fluid and bleed the brakes? Now you won't have too worry about what fluid is in there.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
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    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
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    2007 FJ Cruiser

  3. #3

    Thumbs up Synthetic or regular brake fluid

    I agree with JIMMIEE. Thats what I did on my Silverado, removed old fluid and filled with Synthetic than blead lines. That was two years ago and it still stops!

  4. #4

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    Quote Originally Posted by silveradotrailblazer View Post
    I agree with JIMMIEE. Thats what I did on my Silverado, removed old fluid and filled with Synthetic than blead lines. That was two years ago and it still stops!
    LOL, it still stops!!

    Another thing to keep in mind is brakefluid absorbs moisture. More so living on the coast as opposed to living in the desert. I change my brake fluid every year on all my cars.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  5. #5

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    i'm going to have to agree with the masses here and go the extra distance and drain the current fluid, replacing with synthetic. oh yeah, and while you're at it, don't drink brake fluid, it will dry out your mouth. and probably kill you.
    1994 Chevrolet C1500 Pickup
    Regular Cab, Long Bed, 2 wheel drive.
    4.3L Vortec V6 '262 CID'
    333,000 miles and counting....with a gallon of gas every 14.

  6. #6
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    Default

    i disagree with the others. i do not think it to be a good idea to just drain the fluid. you said if it were to mix, it would cause a reaction. you dont know how much it will take to cause that reaction. it could take alot, it might not take more that the residue left from the drain out. in my opinion, its a bad idea. i suggest researching for a chemist lab or somewhere you can take a sample for an analysis. this is THE most accurate way of telling
    2000 silverado with a 5.3l v8, shorty headers, upgraded plugs, 10 mil wires, magnaflow high flow cats, flowmaster 80 series muffler(2 in 2 out) w/ 18 inch stainless silverline tips. i have a k&n CIA. its a 4x4 z71 offroad package. Ls model.
    extended cab 160k miles, truxedo low profile bed cover, diablo sport predator tuner.
    reman tranny @ 130k miles
    Chris

  7. #7

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    Yes you need to drain the brake system and start fresh. This is always the best way due to all brake fluids start to take on water over time. Use a high quality synthetic break fluid.
    2008 GMC Sierra 2500HD Ex. Cab, Fire Red, 6.6L Duramax LMM Equipped with UTG Rocker Pods


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  8. #8

    Thumbs up Preferred Customers Save Up To 25% Across The Board On ALL Amsoil Products.

    Here I just posted a break service Power Point presentation. Check it out here



    2008 GMC Sierra 2500HD Ex. Cab, Fire Red, 6.6L Duramax LMM Equipped with UTG Rocker Pods


    AMSOIL is the only oil company that...,"Recommends 25,000 mile oil changes","Gives up to four times better wear protection","Warranties your engine against oil related failure"

    Preferred Customers Save up to 30% Click here!!!
    Executive Direct Jobber ZO# 1695636
    Scott Douglass 248-721-1002
    Order online:
    www.1st-synthetics.com




  9. #9

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    I would just carry an anchor in the back just in case the brake do fail!!! which I wish that will never happen but you cant ever be too safe!!
    07 SILVERADO Ls
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  10. #10
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    Default

    Quote Originally Posted by cascott325 View Post
    i disagree with the others. i do not think it to be a good idea to just drain the fluid. you said if it were to mix, it would cause a reaction. you dont know how much it will take to cause that reaction. it could take alot, it might not take more that the residue left from the drain out. in my opinion, its a bad idea. i suggest researching for a chemist lab or somewhere you can take a sample for an analysis. this is THE most accurate way of telling
    I will go to the dealer to see what they charge for that, if I would take a sample into them to have it sent out. My Lumina that I have had to have a gas analysis done a few years back, and the dealer sent that out to some kind of lab but they didn't charge me because I had the work done there. I will post how much it will cost once I find out, thanks for the tip!
    2004 Chevy Colorado
    LS1 5.7 swap/TBSS rear axle swap

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