Brake fluid ~

[chingaling]

just wonder what sort of brake fluid u guys use most ? and what honda like most DOT3 or DOT4 ? :o sorry noobsage

[aaronng]

I use Honda brake fluid. It's DOT4.

[SPEEDCORE]

Rbf600

[chingaling]

what is the difference between dot 3 and dot 4 ? lol correct me if im wrong.. dot4 support most of the cars and got more other fuctions.. or sth else ? :S

[aaronng]

..............Dry boiling point.....Wet boiling point
DOT 3 .......205°C (401°F).....140°C (284°F)
DOT 4 .......230°C (446°F).....155°C (311°F)
DOT 5.1 .....270°C (518°F).....191°C (375°F)

[RABBITrabbit]

i use dot 4

[arron]

Many people swear by Motul RBF600 but it's a little pricey..

I have only heard good things about the Honda OEM brake fluid...

Use a dot 4 for most street applications.. I would consider Super dot 4 or dot 5.1 only for track as it really is unnessesary for street use..

[aaronng]

If it was me, I'd use Honda for street and swap over to RBF600 when track day arrives.

[chingaling]

honda ones are dot 4 ? and also is that means use a higher boiling point flude will be better ??? im currently using dot 4 .. but im considring to change it to dot3 ... coz i want to try what is the difference between ... -_-''

[aaronng]

Honda doesn't make DOT3 anymore, unless you get it from USA. They still use OEM DOT3 there.

You might as well go for DOT4 over DOT3. DOT4 can withstand higher temperature, and is also slightly less hygroscopic than DOT3. The only time you use DOT3 is if your seals in the brake system needs DOT3. Just check your brake resevoir cover and it'll tell you DOT3 or DOT4 or both.

[Drew]

Going from DOT4 to DOT3 is going BACKWARDS not forwards

It's not like theres a huge difference in price if any

Also DOT 5 is synthetic based so a lot of cars dislike it but DOT 5.1 is fine

[chingaling]

Honda doesn't make DOT3 anymore, unless you get it from USA. They still use OEM DOT3 there.

You might as well go for DOT4 over DOT3. DOT4 can withstand higher temperature, and is also slightly less hygroscopic than DOT3. The only time you use DOT3 is if your seals in the brake system needs DOT3. Just check your brake resevoir cover and it'll tell you DOT3 or DOT4 or both.

cheers for that champ:thumbsup:

[EG30]

castrol response super DOT 4

very reasonably priced and widely avail at supercheap auto and repco etc.

[mku01]

i'm using rbf600... but chris at centrax told me that oil is not good for my car i dunno why?

[arron]

.........

huh?

[wuism]

i'm using rbf600

about 30 dollars per 500ml

rbf700 is coming out soon.

[aaronng]

i'm using rbf600... but chris at centrax told me that oil is not good for my car i dunno why?

Depends on the car, but RBF600 can swell the seals if you use it for long durations. It's great if you put it in a few weeks before a track day and then change it back to OEM fluid after.

[SPEEDCORE]

castrol response super DOT 4


This isn't a bad fluid..... however... I've heated it up in the past and had fluid fade so don't want to risk it again.

I've had Chris from centrax say the same thing to me in the past about the motul fluid. Apparently there was an issue with the motul fluid a few years back so he is right about that bulletin that went out about it.

Again.... I've used it for the last 3-4 years no issues, the one time I changed if over to the castrol fluid above....boiled it.

In fairness.... it was at the track last year that it happened, but that was after 1 session and the first lap out of the pits on the 2nd session. So the brakes where not that hot.

[aaronng]

This isn't a bad fluid..... however... I've heated it up in the past and had fluid fade so don't want to risk it again.

I've had Chris from centrax say the same thing to me in the past about the motul fluid. Apparently there was an issue with the motul fluid a few years back so he is right about that bulletin that went out about it.

Again.... I've used it for the last 3-4 years no issues, the one time I changed if over to the castrol fluid above....boiled it.

In fairness.... it was at the track last year that it happened, but that was after 1 session and the first lap out of the pits on the 2nd session. So the brakes where not that hot.

Yup, it's a good street brake fluid. But not for track. When you compare the boiling points of the Castrol Super Response DOT4 and Motul RBF600, it's no comparison:

Castrol SR DOT4,
Dry: 280ºC
Wet: 186ºC

Motul RBF600,
Dry: 312ºC
Wet: 216ºC

That's a 30ºC advantage in both wet and dry, and it's also amazing that RBF600 being a DOT4 fluid actually has higher boiling points than a DOT5.1 fluid!

[Spunkymonkey]

Yup, it's a good street brake fluid. But not for track. When you compare the boiling points of the Castrol Super Response DOT4 and Motul RBF600, it's no comparison:

Castrol SR DOT4,
Dry: 280ºC
Wet: 186ºC

Motul RBF600,
Dry: 312ºC
Wet: 216ºC

That's a 30ºC advantage in both wet and dry, and it's also amazing that RBF600 being a DOT4 fluid actually has higher boiling points than a DOT5.1 fluid!

Castrol used to make the GP600 Dot 4 brake fluid for street/track...

Dry: 310
Wet: 216

so comparable to the Motul, but unfortunately they don't make it anymore!

[Zilli]

i got some Elf stuff from Vracing.. will let you all know how it goes with the DS2500 and slotted rotors when i get out ot the track in a few weeks

[roar]

i use ferodo dot 5.1

its hard to find dot3 stuff nemore...no need to try looking neway lol

in general castrol make excellent brake fluids...their SRF the bee's knees...

so dot4 or dot5.1...just make sure you don't use dot5...its silicon based...and the only modernish cars that use them are like citroens

[aaronng]

Between DOT4 and DOT5.1, the difference is the viscosity. DOT5.1's viscosity is much lower than DOT4 and can cause leaks in some systems. That is why RBF600 is still a DOT4 and not a DOT5.1, its viscosity is closer to that of a DOT4, while the boiling temps are that of a DOT5.1.