twigglius

iTrader: (6)

I am in the process of upgrading my brakes and I have been doing some brake fluid research. I found a great post on a BMW forum with boiling point temps for all the below fluids.



Brake Fluid Data Specs

--------------------------------------------------------------------------

Brand________DOT Rating__Dry Boiling/Wet Boiling

AP Racing 551 - DOT 3 - 527°F (275°C) / 302ºF (145ºC)

AP Racing 600 - DOT 3 - 590°F (310°C) / 410°F (210°C)

AP PRF Racing - DOT 4 - 608°F (320ºC) / 311°F (155ºC)

ATE Super Blue - DOT 4 - 536ºF (280ºC) / 396ºF (194ºC)

ATE Super 200 - DOT 4 - 536ºF (280ºC) / 382ºF (194ºC)

Bosch - DOT 3 - 491ºF (255ºC) / 288ºF (142ºC)

Bosch - DOT 4 - 509ºF (265ºC) / 329ºF (165ºC)

Bosch - DOT 4+ - 536ºF (280ºC) / 356ºF (180ºC)

Brembo LCF 600+ - DOT 4 - 601ºF (316ºC) / 399ºF (204ºC)

Brembo EVO 500+ - DOT 4 - 520ºF (271ºC) / 336ºF (169ºC)

Castrol GT LMA - DOT 4 - 446ºF (230ºC) / 311ºF (155ºC)

Castrol SRF - DOT 4 - 590ºF (310ºC) / 518ºF (270ºC)

GS610 - DOT 4 - 610°F (321°C) / 421°F (216°C)

Gunk(Berryman)HD - DOT 4 - 510ºF (266ºC) / 311ºF (155ºC)

Motul DOT 5.1 - DOT 5.1 - 509ºF (265ºC) / 365ºF (185ºC)

Motul RBF 600 - DOT 4 - 594ºF (312ºC) / 421ºF (216ºC)

Neo Super DOT16 - DOT 4 - 610°F (322°C) / 421°F (216°C)

Pentosin Super - DOT 4 - 500°F (260°C) / 338°F (170°C)

Pentosin RBF - DOT 5.1 - 572°F (300°C) / 392ºF (200°C)

ValvolineProSyn - DOT 3/4 - 527ºF (275ºC) / 347ºF (175ºC)

Wilwood Hi-Temp 570 - DOT 3 - 570ºF (299ºC) / 284ºF (140ºC)

Wilwood EXP600 Plus - DOT 4 - 633ºF (330ºC) / 417ºF (213ºC)

Bearcat94

Added Amsoil.



Brake Fluid Data Specs

--------------------------------------------------------------------------

Brand________DOT Rating__Dry Boiling/Wet Boiling

Amsoil Series 500 - DOT3 - 525°F (274°C) / 313°F / (156°C)

Amsoil Series 600 - DOT 4 - 580°F (304°C) / 410°F (210°C)

AP Racing 551 - DOT 3 - 527°F (275°C) / 302ºF (145ºC)

AP Racing 600 - DOT 3 - 590°F (310°C) / 410°F (210°C)

AP PRF Racing - DOT 4 - 608°F (320ºC) / 311°F (155ºC)

ATE Super Blue - DOT 4 - 536ºF (280ºC) / 396ºF (194ºC)

ATE Super 200 - DOT 4 - 536ºF (280ºC) / 382ºF (194ºC)

Bosch - DOT 3 - 491ºF (255ºC) / 288ºF (142ºC)

Bosch - DOT 4 - 509ºF (265ºC) / 329ºF (165ºC)

Bosch - DOT 4+ - 536ºF (280ºC) / 356ºF (180ºC)

Brembo LCF 600+ - DOT 4 - 601ºF (316ºC) / 399ºF (204ºC)

Brembo EVO 500+ - DOT 4 - 520ºF (271ºC) / 336ºF (169ºC)

Castrol GT LMA - DOT 4 - 446ºF (230ºC) / 311ºF (155ºC)

Castrol SRF - DOT 4 - 590ºF (310ºC) / 518ºF (270ºC)

GS610 - DOT 4 - 610°F (321°C) / 421°F (216°C)

Gunk(Berryman)HD - DOT 4 - 510ºF (266ºC) / 311ºF (155ºC)

Motul DOT 5.1 - DOT 5.1 - 509ºF (265ºC) / 365ºF (185ºC)

Motul RBF 600 - DOT 4 - 594ºF (312ºC) / 421ºF (216ºC)

Neo Super DOT16 - DOT 4 - 610°F (322°C) / 421°F (216°C)

Pentosin Super - DOT 4 - 500°F (260°C) / 338°F (170°C)

Pentosin RBF - DOT 5.1 - 572°F (300°C) / 392ºF (200°C)

ValvolineProSyn - DOT 3/4 - 527ºF (275ºC) / 347ºF (175ºC)

Wilwood Hi-Temp 570 - DOT 3 - 570ºF (299ºC) / 284ºF (140ºC)

Wilwood EXP600 Plus - DOT 4 - 633ºF (330ºC) / 417ºF (213ºC)

I hate cars

Nice thread!

I run the Motul 5.1 because it's twice as thin as other fluids so the ABS is a little more responsive and it shortens stopping distances. I wish I could find 5.1 with a higher boiling point.

That Castrol SRF looks very tempting. The wet boiling point is barely lower than the dry boiling point and the wet boiling point is much higher than anything else. In real life, the fluid is never going to be perfectly dry so unless you flush the fluid every year, this may be the best performace fluid out there. I've heard the price is pretty steep.

Bearcat94

I noticed the Castrol SRF as well. Wonder how they do that? Their spec seems WAY above the rest of the class.

twigglius

iTrader: (6)

additonal info.

Castrol SRF Brake Fluid

Technical Information
_________________________________


Castrol SRF Racing Brake Fluid is an ultra high performance product formulated specifically to satisfy the
ever increasing stresses placed upon the braking systems used in international motorsport. The
exceptional performance of Castrol SRF is due to a novel silicon ester technology pioneered by Castrol
and unique to the extent that it has been granted patent-protection in numerous countries throughout the
world.

Castrol SRF evolved as a direct result of Castrol's ongoing Research and Development program for brake
fluids which identified this silicon ester technology as providing considerable performance benefits when
compared with conventional glycol ether borate ester fluids.

Following exhaustive laboratory tests at Castrol's International Technology Centre in the UK, the final
formulation for Castrol SRF was subjected to an extensive road-test programme on the Gross Glockner
and Stelvio passes high in the Austrian and Italian Alps. It then underwent an independent track test
program conducted by a famous Formula One racing team. Their assessment was that "Castrol SRF is the
best racing brake fluid we have ever used."

Subsequently, Castrol SRF was offered to top flight racing and rally teams throughout the world including
most of the Formula One teams, the all-conquering Jaguar and Mercedes -Benz sports car teams and the
Audi, Nissan and Toyota rally teams. Enthusiastic recommendation by these experts soon created an
immense interest in Castrol SRF throughout the whole spectrum of national and international motorsport.
Today, Castrol SRF is regarded by the international motorsport community as being without equal and it is
chosen not only by factory-supported teams but by private competitors throughout the world.

All conventional brake fluids used in cars and motor cycles are hygroscopic, that is, they absorb water
from their surroundings. Strange though it may seem, the flexible hoses incorporated in braking systems
are permeable to water and in time enough, water can find its way into the system via the hoses, and
seriously affect the brake fluid's performance. This water reduces the boiling point of the fluid (ie, it lowers
the temperature at which gas bubbles begin to form). When these bubbles form, they turn a virtually
incompressible liquid into a mixture of gas and liquid which can be compressed quite considerably, thus
severely reducing the efficiency of the brakes. In this situation, a driver finds that the brakes feel spongy.
Brake-pedal travel will increase and it may be necessary to 'pump' the pedal to get the brakes to function
effectively. However, when the brake fluid reaches a temperature at which the water in the fluid causes gas
to be produced, which is equal to the volume swept by the piston in the rake master-cylinder, vapor-lock
occurs and the brakes become inoperative. When this happens, the first indication the driver has that
something is wrong is when he applies the brakes. The pedal goes down to the floor and the car carries on
at undiminished - and possibly fatal speed.

The silicon ester technology in Castrol SRF addresses this problem in two ways. Firstly, Castrol SRF is
less hygroscopic than conventional brake fluids - it absorbs less water in a given time. Secondly, unlike
conventional glycol ether fluids, Castrol SRF reacts chemically with the absorbed water to reduce its
adverse effects, thus preventing the fluid's high temperature performance and safety margins from
deteriorating as rapidly as they would otherwise do.

Castrol SRF exceeds the US Federal Standards FMVSS 116 DOT 3 and DOT 4, ISO 4925, JIS K2233 and
current SAE J1703 and is miscible with all conventional brake fluids conforming to these standards.
However, mixing Castrol SRF and conventional brake fluids will reduce the benefits of Castrol SRF. It is
strongly recommended that conventional brake fluid be drained from the system before flushing and refilling
with Castrol SRF.

The wet boiling point of Castrol SRF, 270 C, is vastly superior to the minimum requirement of 155 C
demanded by the current US DOT 4 specification. The product's typical dry boiling point of 310 C is
likewise outstanding. This ability to withstand temperatures in excess of 300 C, and its superior resistance
to the effects of absorbed water, have established Castrol SRF as the world's premier fluid for the hydraulic
brakes used in all forms of motorsport.

twigglius

iTrader: (6)

Does anyone know the boiling points of OEM honda fluid?

I hate cars

DOT 3 range is 401-445F Dry and 284F-311F Wet. I know Honda fluid is DOT 3 and I seriously doubt they exceed the minimum spec by much.

That 284 is really scary since you can hit that with a small amount of downhill or slighly aggressive city driving. Even my 13" BBK sees Caliper temps of 200F pretty easily.

twigglius

iTrader: (6)

yea, 284F is indeed scary. makes me want to upgrade my CRV fluid as well.

dwb993

iTrader: (13)

HOLY MOLY!!!! ~$70 per liter!!!

twigglius

iTrader: (6)

Added ProSpeed

Brake Fluid Data Specs

--------------------------------------------------------------------------

Brand________DOT Rating__Dry Boiling/Wet Boiling

Amsoil Series 500 - DOT3 - 525°F (274°C) / 313°F / (156°C)

Amsoil Series 600 - DOT 4 - 580°F (304°C) / 410°F (210°C)

AP Racing 551 - DOT 3 - 527°F (275°C) / 302ºF (145ºC)

AP Racing 600 - DOT 3 - 590°F (310°C) / 410°F (210°C)

AP PRF Racing - DOT 4 - 608°F (320ºC) / 311°F (155ºC)

ATE Super Blue - DOT 4 - 536ºF (280ºC) / 396ºF (194ºC)

ATE Super 200 - DOT 4 - 536ºF (280ºC) / 382ºF (194ºC)

Bosch - DOT 3 - 491ºF (255ºC) / 288ºF (142ºC)

Bosch - DOT 4 - 509ºF (265ºC) / 329ºF (165ºC)

Bosch - DOT 4+ - 536ºF (280ºC) / 356ºF (180ºC)

Brembo LCF 600+ - DOT 4 - 601ºF (316ºC) / 399ºF (204ºC)

Brembo EVO 500+ - DOT 4 - 520ºF (271ºC) / 336ºF (169ºC)

Castrol GT LMA - DOT 4 - 446ºF (230ºC) / 311ºF (155ºC)

Castrol SRF - DOT 4 - 590ºF (310ºC) / 518ºF (270ºC)

GS610 - DOT 4 - 610°F (321°C) / 421°F (216°C)

Gunk(Berryman)HD - DOT 4 - 510ºF (266ºC) / 311ºF (155ºC)

Motul DOT 5.1 - DOT 5.1 - 509ºF (265ºC) / 365ºF (185ºC)

Motul RBF 600 - DOT 4 - 594ºF (312ºC) / 421ºF (216ºC)

Neo Super DOT16 - DOT 4 - 610°F (322°C) / 421°F (216°C)

Pentosin Super - DOT 4 - 500°F (260°C) / 338°F (170°C)

Pentosin RBF - DOT 5.1 - 572°F (300°C) / 392ºF (200°C)

ProSpeed GS610 - DOT 4+ - 626°F (330°C) / 417°F (214°C) ((discontinued))

ProSpeed RS683 - Dot 4+ - 683°F (362°C) / 439°F (226°C)

ValvolineProSyn - DOT 3/4 - 527ºF (275ºC) / 347ºF (175ºC)

Wilwood Hi-Temp 570 - DOT 3 - 570ºF (299ºC) / 284ºF (140ºC)

Wilwood EXP600 Plus - DOT 4 - 633ºF (330ºC) / 417ºF (213ºC)

Bearcat94

DOT definitions/reference:

http://www.answers.com/topic/dot-3

I hate cars

Interesting on the 5.1. According to that site, mine does not meet the minimum temperature requirements to qualify for the 5.1 spec. I have never looked at the temp requirements to be a 5.1 fluid, only the viscosity requirement.

Bearcat94

I didn't cross reference that to insure accuracy. I grabbed that particular page because it wsa the first one I ran across that had the basic info ws all in one place.

If it turns out to be an error, let me know and I can edit it.

I hate cars

I just saw the same specs on Wiki. I may give Motul an e-mail to get their opinion. No big deal but it doesn't cover the wet boiling point either. They must use the "5.1" to designate viscosity.

I'm definately going to use the Castrol next time, before I go to the track. I know it's expensive but if you think about it, you can leave it in longer. Normally you switch the fluid out once a year if you track it. I would feel comfortable leaving the Castrol in for 2-3 years. It still doesn't make up for the price but it softens the blow a little.

Wolks War

iTrader: (1)

Sorry to bring this thread back,

I saw some Russell's long life DOT 5 Silicone Brake Fluid complies with Federal Motor Vehicle Safety Standard #116. It will not boil at temperatures up to 500° F(wet boiling). Russell Silicone Brake Fluid will not absorb moisture and is recommended for street rods as it will not damage paint. Available in 12 oz. bottles. and s it's about 10$/bottles

It doesn't say about dry boiling, but should be quite higher.

What do you think ???

I hate cars

Can't use DOT 5 in any street car. It will kill all seals and doesn't play well with any old fluid left in the system.

Wolks War

iTrader: (1)

Thx, I will than continue my research for some Castrol SRF, but it's not availbale in canada.........

Titanium2k2

iTrader: (2)

Are there any potential risks/problems if I use an aftermarket DOT 3 fluid without flushing the system of the OEM fluid first? I recently added new calipers and rotors ('07 type s) and bled the brakes with OEM fluid. My brake pedal has a little too much travel so I'm going to bleed the brakes again to see if that helps, but I want to use a fluid other than OEM.

Bearcat94

Not really.

You may not get max performance (for the particular fluid) if the old fluid as absorbed some water. To get the full "value" of the new fluid a flush is needed.

But mixing won't cause a compatability problem or anything like that. And it will probably be better overall than it was with the old fluid.

Titanium2k2

iTrader: (2)

Thanks, man! I assumed this was the case. I'll probably shoot to do a flush soon.

InFaMouSLink

iTrader: (10)

DAMNNNNNNNNN that Castrol SRF is expensive!!!

twigglius

iTrader: (6)

I'm about to replace brake fluid. Decided to resurrect this thread as it may possibly help some newer members.

H23Accord

iTrader: (8)

A lot of choices to choose from up there. What did you decide to replace it with?

twigglius

iTrader: (6)

I haven't yet... Currently I have Motul RBF 600.

6spd-GERCO

For 6MT and 5AT TL-S owners, while your flushing/bleeding the brakes might as well flush/bleed the hydraulic clutch system.