What brakefluid do you use and in what?

[MakeMemesDreams]

I need to flush my brakes, have all the tools to do it, used castrol dot 4 last time, had no issues, just wondering if there is something better? What fluid do you use and in what vehicle?

 

[Vinnige Fanie]

Do you drive your vehicle enthusiastically?

If yes get RBF660/700 from Motul.

If not then just use a good quality DOT4 and you will be fine.

 

[MakeMemesDreams]

Very enthusiastically, but have never had a problem with stopping when needed. What makes the Motul better? A higher boiling point?

 

[Scrooloose]

DOT ratings tell you at which temperature the fluid will boil.

I generally stick with Castrol DOT 4. If it's good enough for track motorcycles, it's good enough for me.

 

[MakeMemesDreams]

DOT ratings tell you at which temperature the fluid will boil.

I generally stick with Castrol DOT 4. If it's good enough for track motorcycles, it's good enough for me.

Doesn't the DOT rating also specify what the fluid is mad of? Read somewhere that you can use dot 3 and 4 interchangeably, and you can mix 5.1 and 4, but never mix 5 with anything else, as its made from a different base fluid?

 

[Scrooloose]

Doesn't the DOT rating also specify what the fluid is mad of? Read somewhere that you can use dot 3 and 4 interchangeably, and you can mix 5.1 and 4, but never mix 5 with anything else, as its made from a different base fluid?

It stands to reason that the base formula would differ. Varying levels of glycol and whatever else brake fluid is made from determine the boiling point. I'm no expert in what the chemical makeup of the stuff might be. Why would you want to blend the stuff anyway? It's not like you're driving a F1 car. Stick with what the owner's manual says you should use and don't overthink it.

 

[MakeMemesDreams]

I don't want to mix them lol. Had a look in the owners manual, only said DOT 4, no other information. The castrol worked just fine for me, but if there is something better, why not use it? Obviously not if it costs 10 times the price, but a little more for a bit more performance couldn't hurt

 

[M@tree2]

Motul DOT3/4 Brake Fluid

Motul DOT 3/4 Brake Fluid 500ml

trac-mac.com

Motul RBF660 Racing

Motul RBF 660 DOT 4 Racing Brake Fluid 500ml

trac-mac.com

Have a look at the boiling points of the various fluids, as @Vinnige Fanie said, the motul RBF series is a higher quality product.

Just bought a bike, but when I do service the brakes, will be switching it to RBF660

 

[el_guapo3291]

DOT 3,4 and 5.1 are all glycol based, it's not possible to make an objectively "better" braking fluid without changing the base fluid used it's all just marketing fluff, changing the base fluid would require modifying the entire braking system which is why you cannot use DOT 5 with the others because it's silicone based. Glycol is Glycol, just get any reasonably known brand and you're good to go.

 

[Trompie67]

DOT 3,4 and 5.1 are all glycol based, it's not possible to make an objectively "better" braking fluid without changing the base fluid used it's all just marketing fluff, changing the base fluid would require modifying the entire braking system which is why you cannot use DOT 5 with the others because it's silicone based. Glycol is Glycol, just get any reasonably known brand and you're good to go.

You're forgetting the superior feel good anecdotal kak that spending more money on the same stuff in different packaging gives the user!

 

[Fluke]

RBF660 and replace once a month or when it darkens. No point in getting SRF when it's so much more expensive. Haven't boiled it yet, but have definitely gotten brake fade and heated the fluid up more than I'd like... but I need bigger brakes anyway because they're a joke on my car.

Avoid 5.0 as it's silicone based and can/will eat rubber seals + doesn't mix with glycol based fluid.

 

[MakeMemesDreams]

RBF660 and replace once a month or when it darkens. No point in getting SRF when it's so much more expensive. Haven't boiled it yet, but have definitely gotten brake fade and heated the fluid up more than I'd like... but I need bigger brakes anyway because they're a joke on my car.

Avoid 5.0 as it's silicone based and can/will eat rubber seals + doesn't mix with glycol based fluid.

once a month seems really excessive, how does it darken that quickly?

 

[Lostears]

My 2c on the matter (for bikes). I switch with stock brakes to RBF660 and was a HUGE difference. I dont mean initially stopping power, but consistant stopping power. RBF660 has a much higher boiling point without needing to be replaced as often as the race fluids. Imo its the option in terms of longevity and power and bang for buck.

After upgrading master cylinder and braided steel lines, the RBF660 just works flawless. Lap after lap on the track with consistent feel on the brakes.

 

[Fluke]

once a month seems really excessive, how does it darken that quickly?

Just s2000 things lol

I replaced the master, slave, hose and clutch entirely around a year ago and it still does it. I also just remove all of the fluid from the master cyl and replace it via a syringe so it takes me ~15 minutes to do. It's not a full flush per say.

 

[maq_]

My advice would be to not obsess about your brake fluid too much, it gets addictive.

You think you can stop anytime but can you...

 

[Redshiftza]

CBR250R, MT-07 and R6.... all the manuals just say DOT 4

Honda dealer gave standard Castrol DOT4 for the CBR (500ml @ R100)
Yamaha dealer gave Yamalube DOT4 for the MT-07 (236ml @ R295)
Yamaha dealer asked "what's my preference" for the R6 and offered Yamalube or Motul products.

Fkn marketing and brand loyalty is a bitch hey? 🤣

 

[Fluke]

Castrol SRF is the gold standard (really good wet boiling point), Motul is bang-for-the-buck (great dry boiling point, better than average wet boiling point). Rest are pretty similar.

From what I've heard from others, SRF also absorbs at a slower pace - but I havent used it personally as it's $$$.

 

[CarboVan]

Not brake related, but I am getting clutch pedal fade on hot/traffic days after a while. Pedal returns to normal once cooled.
I've flushed with fresh castrol dot 4, which fixed the constant poopy feel it had when I got the car, but the fade started to happen within a few days.

Rate it's worth me giving the 660/700 a bash? 🤔 [ Of course it might actually be my master and/or slave starting to fail ]

 

[Carbohydrate]

Midas brand

 

[madness_inc]

Midas brand

Just did a brake job on a classic car and used midas brake fluid. Works great.

 

[KangarooMike]

I track my cars (2007 Forester XT with stock brakes and EBC Blues and a 1980 Mini with Golf disks). I was getting brake fade on normal dot 4 fluid. I moved to Motul 660 and I have pushed so hard that my disks start to glow and no more fade.

Street driving will be fine with some generic fluid but I recommend some performance fluid if you plan on tracking your car.