What brake fluid do you use?

[koozy]

What brake fluid do you use? Any particular brand or specifications that influence your choice?


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[Ford ST]

I use Dot 4 in the yellow bottle I think we all know what brand I'm talking about they make antifreeze.

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[TyphoonFiST]

Prestone* is what your thinking of or Pentosin.... I use Bosch 5.1 latest and greatest that's not over priced because I got it on clearance and it comes in a metal can!

 

[Paul_H]

When I install my new calipers and SS lines I'll be using Motul RBF 600. Main reason I went that is the high boiling point.

 

[M-Sport fan]

Even though many bash it for being over-rated, and it co$t$ more than gold, I am thinking about the Castrol SRF for when I do the clutch/brake fluid flush.

It still has the absolute best/highest WET boiling point on the planet, and if you are leaving it in there for street length intervals (as opposed to bleeding every/every other weekend, and flushing out a couple of times a year for open track use, as MUST be done with the high DRY boiling point, but lower wet point fluids), that is what matters.

My low cost choice would be the Ate Typ 200 gold, since that has a proven longevity factor as well, albeit not anywhere near as high wet or dry boiling points.

 

[Woods247]

I use ATE Type 200. I tried RBF600 first but it didn’t manage heat very well when I was using stock brakes on the track. I switched to ATE Type 200 and pedal feel was better at the end of 20min sessions. I have no fade at all when combined with my BBK. I was about to switch to Castrol SRF but it’s unnecessary now.

Edit: I flush my brakes A LOT. I flush the calipers after every track day. SRF would be far too expensive but perhaps it might not require frequent flushing. I would rather flush the ATE and have a clear head about it.

 

[koozy]

No one cares to run Ford specified LV (low viscosity) DOT4? Some who posted are using LV whether they know it or not by the brand they've chosen to use.

The difference I'm seeing between regular DOT4 viscosity and LV DOT is at least half the viscosity!

 

[Ford ST]

No one cares to run Ford specified LV (low viscosity) DOT4? Some who posted are using LV whether they know it or not by the brand they've chosen to use.

The difference I'm seeing between regular DOT4 viscosity and LV DOT is at least half the viscosity!

What is the benefit of low viscosity brake fluid?

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[TyphoonFiST]

I use ATE Type 200. I tried RBF600 first but it didn’t manage heat very well when I was using stock brakes on the track. I switched to ATE Type 200 and pedal feel was better at the end of 20min sessions. I have no fade at all when combined with my BBK. I was about to switch to Castrol SRF but it’s unnecessary now.

Edit: I flush my brakes A LOT. I flush the calipers after every track day. SRF would be far too expensive but perhaps it might not require frequent flushing. I would rather flush the ATE and have a clear head about it.

Wanna flush my brakes? Cripes that's a lot of flushing! I bet you have it down to a science!

 

[koozy]

What is the benefit of low viscosity brake fluid?

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benefit? hmmm.. well for one it's what the book calls for, so one can be rest assured if they have no clue one way or the other what to use. Aside from that it apparently offers a higher safety margin against vapor lock and has excellent resistance to absorbing and retaining water over regular DOT4, especially for those in colder climates.

LV DOT4 is also recommended for use in the hydraulic brake and clutch systems of modern vehicles fitted with Electronic Stability Control systems.

 

[speed_easy]

I have both Motorcraft Dot 4 and Motul 660 sitting on my parts shelf. The first I used to top off for the first year or so, through the first OEM front brake change. More recently I've ran the rbf 660 with the race pads and rotors beginning in June 2018. That's what I have in my lines now. But with motorcraft rotors and pads
This car needs another top off on fluid. About to be on my third street brake set with 76k on the clock.

This car breks.

 

[koozy]

It should be noted that Motorcraft DOT 4 is LV.

 

[speed_easy]

Which one do you prefer OP?

Is it LV or HV or somewhere in between??

 

[koozy]

Which one do you prefer OP?

Is it LV or HV or somewhere in between??

Funny you should ask! LOL

I'm currently using Prestone DOT4 because though the bottle seal had not been broken I've had it for far too long sitting on my shelf and wanted to use it. So yeah, not by the book but neither is my motor oil choice with 0w40.

For my next brake fluid flush I will use what is easily attainable locally which is Pentosin DOT 4 LV or Motorcraft DOT 4 LV. Either will suffice for my needs and use.

 

[speed_easy]

Why do you need ultra low end temp viscosity? Do you not like cold starts that much?

The 40w in California valley I can understand. But both extremes at the same time??

 

[koozy]

Why do you need ultra low end temp viscosity? Do you not like cold starts that much?

The 40w in California valley I can understand. But both extremes at the same time??

Not so much a need, but want to go by the book for it. The brake, abs, and esc are a critical components in handling and stopping and if it was design with LV in mind, then I will just go with it. I don't want to over think it. It's also a better fluid for my use than regular DOT 4.

 

[speed_easy]

Funny you should ask! LOL

I'm currently using Prestone DOT4 because though the bottle seal had not been broken I've had it for far too long sitting on my shelf and wanted to use it. So yeah, not by the book but neither is my motor oil choice with 0w40.

For my next brake fluid flush I will use what is easily attainable locally which is Pentosin DOT 4 LV or Motorcraft DOT 4 LV. Either will suffice for my needs and use.

Nothing like good brake fluid. The best brake fluid has zero water in it!

 

[speed_easy]

Not so much a need, but want to go by the book for it. The brake, abs, and esc are a critical components in handling and stopping and if it was design with LV in mind, then I will just go with it. I don't want to over think it. It's also a better fluid for my use than regular DOT 4.

This is interesting. Ever since I went motul 660 my brakes felt kind of sloppy. Not less... critical threshold control force. Moreso mid breaking zone cornering feel.

Do you think this has anything to do with the "e" LSD sharing the esc control unit??

 

[koozy]

This is interesting. Ever since I went motul 660 my brakes felt kind of sloppy. Not less... critical threshold control force. Moreso mid breaking zone cornering feel.

Do you think this has anything to do with the "e" LSD sharing the esc control unit??

Completely feasible. There are minute orifices for fluid to occupy within the ABS and ESC system. The higher viscosity can affect fluidity and operation IMO. It would be interesting if in the future you can swap fluid and note the differences if any.

 

[speed_easy]

Completely feasible. There are minute orifices for fluid to occupy within the ABS and ESC system. The higher viscosity can affect fluidity and operation IMO. It would be interesting if in the future you can swap fluid and note the differences if any.

I can believe it. Any changes with regard to viscosity mean a difference in fluid flow per given rate. Changing the viscosity of the fluid without subsequently redesigning the orifice size could change net pedal / customer input feel.