Brake Fluids Question

[derieuz]

Is there a down-side to putting a "racing" brake fluid into a street car? I am looking to get the best possible brake fluid for my car and I do not know anything about the properties of brake fluids. Is there a downside to finding the highest wet and dry boiling temperatures?

I plan on swapping to stainless lines when i remove my calipers and flush the fluid for new fluid when i have my calipers painted, and want to put the best possible fluids in my car

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[Grimace427]

Racing fluids require more maintenance as they absorb water more quickly than street fluid. The typical service interval for street-driven brake fluid is two years or 20,000 miles. People using race brake fluid and actually racing typically flush the fluid after every event. I'd figure every few months if you don't track every weekend.



IIRC Ford puts DOT3 fluid in from the factory. I changed to DOT4+ Mercedes-spec fluid as that is what I have in stock and it goes the same 2-year service interval as standard fluid and has improved thermal properties.

If you are actually racing than getting a top quality brake fluid is a must. Motul RBF 600/660 get top recommendations. https://www.motul.com/ca/en-US/products/oils-lubricants/rbf-600-factory-line?f%5Bapplication%5D=144

 

[bbrilli]

What Grimace said. There is no need for racing fluid on the street. Go with a good Dot 4 and you should be fine. I stay away from silicone based fluids (Dot 5) because while they don't absorb water, if any water does get in your system it moves to the lowest point (the calipers) and can cause corrosion problems.

 

[rcb020]

Stock brake fluid in the 2015 is DOT 4, Motorcraft PM-20. Nobody can seem to find the boiling specs on it though. I will be doing a HPDE next weekend with the stock fluid and hoping it holds up, most likely switch to RBF 600 before the next event.

 

[allgripnoslip]

I'm looking to change out my fluid soon, but I can't find any specs for how much brake fluid a '15 GT PP's brake system contains.

I need to know how much brake fluid I should order to repleace the stock brake fluid with the brake fluid of my choice.

If anyone could post or point me to that infromation, I'd greatly appreciate it.

 

[apex15stangPP]

In my experience the stock fluid is fine, I used it for 5 track days and it never gave up. I have switched now to ATe Amber Type 200 which feels and acted about the same over the weekend. The brake on the PP cars are nuts you can really get on them and use them and they never give up!!

 

[RobD]

I have been using Valvoline synthetic brake fluid for years and have had great results with it. You can buy it at Walmart or any auto parts store, 2 quarts should be enough. Compatible with DOT 3 and 4 and I think it absorbs moisture a little slower. Usually brake fade from the fluid boiling is because most people neglect the 2 year change interval. The old fluid has absorbed moisture from the vented cap and moisture boils much lower than pure brake fluid. While your doing brake stuff might as well add speed bleeders which really makes it a one man operation. I have a set of them on my bike which has 7 bleeders, made a huge difference. BTW Dot 5 would never work unless you completely disassembled all brake components to remove all the DOT 4 as they don't mix.
Dot 3 (dry) 401 degrees and Dot 4 (dry) 446 degrees, these go down once moisture is absorbed.
http://www.stoptech.com/technical-support/technical-white-papers/brake-fluid

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