Stocker brake fluid recommendations....

[MR DERBY CITY]

Just curious , anyone run synthetic brake fluid in their Stockers ? Thanks in advance for any reply’s....

[tomcraig]

Been running DOT5 in my car for about 10yrs.

[Larry Hill]

Why would you change from DOT 3 to DOT 5. I would like to know. Thanks

[jmcarter]

Since DOT 5 is not recommended for ABS brakes and I frequently tap into my "race" fluids for the street cars/trucks I do not keep in around. Use DOT 4 but not for the higher boiling point but because you can get it in colors so that you can readily tell when you've flushed out the old and replaced it with new. Any way it goes you need one of these:

https://www.turnermotorsport.com/p-3...-fluid-tester/

[Tom Goldman]

I use Wilwood Super 570 fluid in my SG car stopping at nearly 170 and all the S/SS cars I work on .
Its boiling point of 570 degrees is the highest of any DOT 3-4 type fluid.
This means it can absorb more moisture from the atmosphere as all glycol based fluids do without boiling at low temperatures.
Silicone DOT 5 fluids are not hygroscopic ,so they do not absorb the moisture that enters the system ,meaning that the water absorbed will stay separated, and boil at 212 degrees, causing a softer pedal.
Dot 5 should never be used for racing.
One thing that most Drag racers do not do regularly is flush out and change the brake fluid.
When you see cloudiness or dark discoloration of the fluid, thats a warning sign of contamination and overheating . ....This is what leads to most brake master cylinder and caliper failures . the seals themselves dont actually fail , its the corrosion of the bores caused by the contaminants in the fluid.
The fluid should ALWAYS be clean and clear as it came from the container. ....You can get a battery operated test pen for about $25 ,quick easy way to check the fluid condition.
I service some amateur road race Corvettes . ...The sanctioning body REQUIRES the brake fluid be changed before each event and certified ,along with other components by a certified inspector.

[fordteacherguy]

Brake fluid has changed over the years...modern HP vehicles use synthetic brake fluid.

Dot 5.1 is glycol based synthetic brake fluid with 500 degree boiling boiling point and "normal" brake fluid viscosity. Available anywhere...........absorbs moisture as well...and still need to be changed but good stuff.

[Tom Goldman]

Originally Posted by fordteacherguy

Brake fluid has changed over the years...modern HP vehicles use synthetic brake fluid.

Dot 5.1 is glycol based synthetic brake fluid with 500 degree boiling boiling point and "normal" brake fluid viscosity. Available anywhere...........absorbs moisture as well...and still need to be changed but good stuff.

Brian, you are correct about the 5.1 being glycol based .
It is not subject to the problems associated with DOT 5 Silicone based fluids.
The Wilwood fluid I mentioned is a synthetic glycol fluid .
Although they do not mark it as such it meets the specs of the 5.1 fluids.
I've also used the Motul 600 and others on the road race cars ,but the Wilwood performed just as well and is less expensive.