is dot 5.1 brake fluid bad for the street?

[tinkerbell]

do a search, if you don't know what i run by now, you clearly read none of my posts... >_<

[vtml]

Oh really...I haven't bleed mine for almost 3 years and still works fine & hard

I am still going to say that you are a brave men for not bleeding it for 3 years. And I thought you are using RBF600 which someone in here has already stated that it's not DOT 5.1 ?

I am going to bleed my brakes again using your method Tinkerbell and see if that makes any difference.

[Wlee2]

do a search, if you don't know what i run by now, you clearly read none of my posts... >_<

I do read them.. it just doesnt retain very well =P..

[tinkerbell]

true.

i have edited my post...

[tinkerbell]

anyone besides vtml using DOT 5.1?

[Wlee2]

im using penrite Sin.. which is a dot 5.1.

i was previously using Castrol Super Dot 4.

[Jingers]

just got my brake fluid bleeded and refilled with nulon super dot 4. Hmmmmmm lets see how it goes. Its so cheap anyways

[tinkerbell]

im using penrite Sin.. which is a dot 5.1.

i was previously using Castrol Super Dot 4.

do you track it, does the pedal get soft after a track day?

does it eventually get better?

or do you have to bleed it?

[Wlee2]

I have the same fluid in my car now as i did when i took it onto the track.. still firm and most people comment about my brakes saying it feels like aftermarket.. shocked to find i only changed pads and fluid but still the stock calipers.


I only bleed when i feel that either i think its starting to feel spongy.. or i want to try a new fluid out.

i dont think i have ever felt my car go from spongy... to better.... but for price i feel the penrite sin so far does well

and after bleeding regardless of fluid it always feels better ^_^..

[Jingers]

i dont know what fluid was in my car originally but now with the nulon super dot 4 it is alot more progressive interms of braking.

[no_torq]

super dot 4 is dot 5.1.

"In so many words, DOT 5.1 fluids are simply DOT 4-type fluids which meet DOT 5 performance requirements. Because of this, they typically can be mixed with DOT 3 or DOT 4 fluids without concern. In some circles, they are even referred to as ‘DOT 4 Plus’ or ‘Super DOT 4’ fluids because they are more similar to a conventional DOT 4 fluid by chemistry than they are to a conventional DOT 5 fluid. In fact, DOT 5.1 is essentially comprised of Borate Esters."
ref: http://www.stoptech.com/tech_info/wp...fluid_1a.shtml

[Wlee2]

super dot 4 is dot 5.1.

"In so many words, DOT 5.1 fluids are simply DOT 4-type fluids which meet DOT 5 performance requirements. Because of this, they typically can be mixed with DOT 3 or DOT 4 fluids without concern. In some circles, they are even referred to as ‘DOT 4 Plus’ or ‘Super DOT 4’ fluids because they are more similar to a conventional DOT 4 fluid by chemistry than they are to a conventional DOT 5 fluid. In fact, DOT 5.1 is essentially comprised of Borate Esters."
ref: http://www.stoptech.com/tech_info/wp...fluid_1a.shtml

We know Tinks posted that same link before pg page 2 =P..

But for ease we were refering to dot5.1 because he asked who has used it =P..

and the name of the fluid is actually called super dot 4 .. which adds a bit to the confusion =P.. i dont know why they dont just adapt the 5.1 name? any ideas?

[Jingers]

We know Tinks posted that same link before pg page 2 =P..

But for ease we were refering to dot5.1 because he asked who has used it =P..

and the name of the fluid is actually called super dot 4 .. which adds a bit to the confusion =P.. i dont know why they dont just adapt the 5.1 name? any ideas?

just different industry naming standards i guess. Will be testing the brakes out at track on friday and will report back if super dot 4 is good or if its all just a marketing ploy. I also noticed there are many different standards of measurement for wet/dry boiling point.

[Wlee2]

Yeh mugsee was ment to give a report on how the Penrite Sin went for him

the otherone that was interesting or not sure if its worth trying out was the brembo brake fluid which is a dot 5.1 (i think) i forget its name =P.. but they said the price was cheaper than the RBF600 (did i get that right =P)

Anyone ever tried the LCF600 plus from brembo?

Edit: and im uncertain about the price.. someone told me it could be bought for less than the page i found =P.. much less..

[tinkerbell]

ummm, my price for RBF600 from the states is $13us per 500ml bottle

more than half the price than is advertised on the tirerack site ($29us)

got any local prices for the brembo stuff?

(NB - it is better by a very small percentage than the RBF600 in DRY, but worse in WET)