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Castrol SRF Shortage #5215256 09/17/19 01:26 PM
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kyoo Offline OP
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Posts: 211
Anyone have any inside line on what's going on with Castrol SRF? Every single vendor/company I know seems to be out of stock of this stuff.


06 Mitsubishi Evolution IX MR (6spd) 5w30 RL
11 BMW M3 (6spd) 5w50 RL
07 Toyota Corolla (AT) 0w20 SSO
12 Toyota Prius (CVT) 0w20 SSO
Re: Castrol SRF Shortage [Re: kyoo] #5215278 09/17/19 01:58 PM
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ragtoplvr Offline
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Did it have die in it. They made them take the colored fluids off the market as they do not conform to the regulations.

Rod

Re: Castrol SRF Shortage [Re: kyoo] #5215283 09/17/19 02:07 PM
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bdcardinal Offline
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No dye in it. My vendor that carried it is out, as is Amazon. Strange for sure. Someone draw the short straw and email them.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Castrol SRF Shortage [Re: kyoo] #5215292 09/17/19 02:18 PM
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slacktide_bitog Offline
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You can get it from this British seller on eBay smile

Shipping seems to be $10 regardless of the number of bottles ordered

Re: Castrol SRF Shortage [Re: kyoo] #5215627 09/17/19 09:47 PM
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A_Harman Offline
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Give Motul RBF 600 a try. I tried SRF, but it was too expensive and hard to find, so I switched to Motul and it worked just as well.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: Castrol SRF Shortage [Re: kyoo] #5215736 09/18/19 03:25 AM
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Lowflyer Offline
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No, do not. RBF600 is in daily cars, according statements from Motul itself, not quite unproblematic in daily systems (cars).
But RBF660 its laugh (no idea why, but this IS so, Motul says). Therefore, if, better select 660 than 600.

I drive since many many changes (and years, all 2 years change) in my little daily/365days racer 50:50 Motul 5.1 and RBF660. This works, hitherto, BEST. + braided steel brake lines and I have never more a soft brake pedal. And works also impeccable with ABS and ESP.

Last edited by Lowflyer; 09/18/19 03:28 AM.
Re: Castrol SRF Shortage [Re: kyoo] #5215755 09/18/19 05:21 AM
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A_Harman Offline
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I have used RBF600 in my Camaro for 16 years, in my Dodge for 10 years, and in my Corvette for 15 years.
600,000 miles of driving accumulated among the three.
200+ hours of track driving on the Corvette and Camaro.
48 US states and 6 Canadian provinces covered in the Dodge towing trailers year-round in temperatures ranging from -15F to 107F.
No problems related to brake fluid selection.
Just try to tell me I'm wrong.

Last edited by A_Harman; 09/18/19 05:35 AM.

1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: Castrol SRF Shortage [Re: kyoo] #5215779 09/18/19 06:30 AM
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oliver88 Offline
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We are using Endless RF650 fluid nowadays in the race cars. Impressive fluid.

Re: Castrol SRF Shortage [Re: oliver88] #5216088 09/18/19 11:50 AM
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bdcardinal Offline
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Originally Posted by oliver88
We are using Endless RF650 fluid nowadays in the race cars. Impressive fluid.


I will have to look at the book again, but is that what Dan Binks said Corvette Racing used in his book "Making it Faster"?


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Castrol SRF Shortage [Re: A_Harman] #5216153 09/18/19 01:13 PM
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Lowflyer Offline
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Originally Posted by A_Harman
I have used RBF600 in my Camaro for 16 years, in my Dodge for 10 years, and in my Corvette for 15 years.

1.WOW^2. I didn't know that RBF600 is insomuch old stuff...
2. d... f... s... shrug After crash Tb 3 yeras ago I lost more emails. Also a few I have correspond with Motul abouzt 5.1 and RBFs. That, whereat I spoke.
3. The only one what was and still is, are the actuelly datasheets:

600
"Specially designed to resist to high temperature of racing actuated brake (steel or carbon) and clutch
systems.
Exceeds DOT 5.1 and DOT 3 standards also, except for viscosity at -40°C (-40°F).

660
"Specially designed to resist to extreme temperature generated by racing carbonand ceramic brakes
allowing minimizingair entrance for brake cooling .
Can be also used with conventional steel discs and clutch systems actuators.
Widely exceeds DOT 3, DOT 4 and DOT 5.1 standards (except for DOT 5.1 viscosity at -40°C)."

4. RBF is, as mentioned, OK. But since 660 I see no one reason to use 600.

Last edited by Lowflyer; 09/18/19 01:14 PM.
Re: Castrol SRF Shortage [Re: Lowflyer] #5216218 09/18/19 02:34 PM
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A_Harman Offline
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Originally Posted by Lowflyer
Originally Posted by A_Harman
I have used RBF600 in my Camaro for 16 years, in my Dodge for 10 years, and in my Corvette for 15 years.

1.WOW^2. I didn't know that RBF600 is insomuch old stuff...
2. d... f... s... shrug After crash Tb 3 yeras ago I lost more emails. Also a few I have correspond with Motul abouzt 5.1 and RBFs. That, whereat I spoke.
3. The only one what was and still is, are the actuelly datasheets:

600
"Specially designed to resist to high temperature of racing actuated brake (steel or carbon) and clutch
systems.
Exceeds DOT 5.1 and DOT 3 standards also, except for viscosity at -40°C (-40°F).

660
"Specially designed to resist to extreme temperature generated by racing carbonand ceramic brakes
allowing minimizingair entrance for brake cooling .
Can be also used with conventional steel discs and clutch systems actuators.
Widely exceeds DOT 3, DOT 4 and DOT 5.1 standards (except for DOT 5.1 viscosity at -40°C)."

4. RBF is, as mentioned, OK. But since 660 I see no one reason to use 600.


I considered using RBF660 years ago, but I checked the wet boiling point. It was identical to the RBF600 at 204C. One should pick a racing brake fluid based on the wet boiling point, not the dry boiling point. Dry boiling point is only for advertising. Real performance on the track is governed by wet boiling point. After a brake fluid container is opened, and the fluid has been exposed to the atmosphere, dry boiling point becomes irrelevant, especially if you ever drive your car in the rain. So I decided to save a few bucks and go with RBF600. Many years later, I am still alive to tell the tale.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: Castrol SRF Shortage [Re: kyoo] #5216274 09/18/19 03:18 PM
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Lowflyer Offline
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Posts: 219
Yep. I know it all wink (dry and wet boiling points).

From the emails (selfhypnosis just even...) 660 absorbing/attracting water little slowly than 600 and have less agressive pH.
True racing brake fluids must be changed in daily use every few months. Ok maybe not in Nevada, Arizona or New Mexico...

Track was not be mentionde by OP. Sorry if that is the topic.

Quote
So I decided to save a few bucks
Hmm... Why? You move Z51 Corvette on track, Z28 LS1, RAM 2500 etc. wink

ps:
Motul now with RBF700. Also with the "Can be also used with conventional steel discs and clutch systems actuators" passage. Like 660.
But not in 600 specs...

Last edited by Lowflyer; 09/18/19 03:20 PM.
Re: Castrol SRF Shortage [Re: Lowflyer] #5216322 09/18/19 04:08 PM
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nthach Offline
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Originally Posted by Lowflyer

True racing brake fluids must be changed in daily use every few months.

Probably why Castrol was pretty proud of SRF/React due what their marketing material in Canada and the rest of the world claims "unique silicon ester technology" that allowed it to be less hygroscopic than most glycol ether-based fluids.

Re: Castrol SRF Shortage [Re: kyoo] #5216649 09/19/19 01:21 AM
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Lowflyer Offline
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I have never understand SRF. With silikon, its Dot5-like. With ester, its LHM-like. You should both never put in Dot4/5.1 systems. But you may do it with SRF. Grab bag laugh And very expensive. But i dont says, that cant works. It works. Grab bag...

Castrol says, longest using 18 Months. Conventional Dot4/5.1 fluids 24 to 36 months. Other racing fluids "few moths".

My next brake fluid for street racer is next year again 50:50 from Motul. This time with 5.1 and RBF700. I mean this should be enough for street whistle

Re: Castrol SRF Shortage [Re: kyoo] #5217077 09/19/19 12:59 PM
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nthach Offline
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I don't race, but my standard brake fluid is ATE SL6, Type 200 or Castrol GT LMA. I like being able to go as long as possible on brake fluid flushes.

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