Brake Fluid Question
#1
Brake Fluid Question
I am looking to upgrade from the OEM DOT 3 brake fluid to Motul RBF600 DOT 4 fluid. I have read in several places that you do not want to put DOT 4 fluid in the stock system without changing some other brake system components. I have Hawk HPS pads and that is all I have changed in the brake system. I plan on getting the Stoptech braided lines in the future, just not at this time. Due to not knowing any better, I have run 1 year of AutoX and had 3 trips to the Tail of the Dragon on the OEM brake fluid. I am going back to the dragon in 3 weeks and at least want to get this upgrade done before then. So, here are my questions regarding this:
1) Is it OK to run the Motul RBF600 full synthetic brake fluid without replacing any other components?
2) What is the fluid capacity or how many 500ml bottles do I need to buy? I know the Stoptech Stage 2 upgrade comes with 3, but a friend of mine did not use but around 1 bottle or so. I can get these for $11 + shipping per 500ml bottle from www.JSCSpeed.com.
3) If running this fluid, how often do you change it out? I have read anywhere from 8 months to 2 years is sufficient.
TIA,
Zach
1) Is it OK to run the Motul RBF600 full synthetic brake fluid without replacing any other components?
2) What is the fluid capacity or how many 500ml bottles do I need to buy? I know the Stoptech Stage 2 upgrade comes with 3, but a friend of mine did not use but around 1 bottle or so. I can get these for $11 + shipping per 500ml bottle from www.JSCSpeed.com.
3) If running this fluid, how often do you change it out? I have read anywhere from 8 months to 2 years is sufficient.
TIA,
Zach
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Originally Posted by jlvvega
go dot 4 but if you go dot 5 you need to change brake lines because the dot 5 has stonger quimical reaction.
#7
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Sorry for the hijack Zach!
I'm just about to install Stoptech lines+rotors.
Want to swop to the Motul brake fluid also.
As Zach asked before, how many 500ml bottles am I going to need?
Thanks
George
Want to swop to the Motul brake fluid also.
As Zach asked before, how many 500ml bottles am I going to need?
Thanks
George
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Originally Posted by jlvvega
go dot 4 but if you go dot 5 you need to change brake lines because the dot 5 has stonger quimical reaction.
also it is not reccomended for abs equipped cars
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Originally Posted by g_torphins
I'm just about to install Stoptech lines+rotors.
Want to swop to the Motul brake fluid also.
As Zach asked before, how many 500ml bottles am I going to need?
Thanks
George
Want to swop to the Motul brake fluid also.
As Zach asked before, how many 500ml bottles am I going to need?
Thanks
George
#10
Originally Posted by g_torphins
I'm just about to install Stoptech lines+rotors.
Want to swop to the Motul brake fluid also.
As Zach asked before, how many 500ml bottles am I going to need?
Thanks
George
Want to swop to the Motul brake fluid also.
As Zach asked before, how many 500ml bottles am I going to need?
Thanks
George
#12
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One last point: Motul brake fluid is a fine product, but is known to be very hydrophillic. Living in a humid climate like Scotland means you should plan to bleed your brakes twice a year to prevent any moisture from affecting the fluid itself.
David Muramoto
Sport Z Magazine Motorsports Editor
David Muramoto
Sport Z Magazine Motorsports Editor
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Originally Posted by dkmura
My pleasure, George. Does that mean I should bring a snorkel if I come visit?
No snorkel required ,but some midgy(mosquito) repellant would
be wise if you're in the countryside here in the summer.
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Originally Posted by ssk0771
Does brake fluid make that much difference whether its stock or syn?
I am think of changing my brake fluid also along with Steel brake line.
I am think of changing my brake fluid also along with Steel brake line.
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Motul RBF600 is great for track and street. Good value / performance ratio. It is most definitely compatible with your vehicle without any other modifications.
If you do a full flush on the car, you'll go through 2 bottles. We usually recommend 3 bottles to our customers because we've found that most people want a spare on hand for a bleed. Some times, you have to bleed the car twice (or more) to get all of the air out of the system. Or, you if you take the car to the track and boil the fluid, you want to flush it out after or between days/sessions.
Also, if you open a bottle, you want to get rid of it after a month. Once it's opened, it starts to absorb water. We always date a bottle with a marker once we crack it open.
Finally, the frequency of bleeding depends entirely on use. If you're just daily driving and that's it, you can flush it out every 8-9 months with no issues. Once a year is even fine. If you're heating it up on a regular basis though (like track use), you'll want to keep it fresh. Depending on the tracks I'm driving, I bleed anywhere from 1 time per day to 3 events. For example, I'd do 3 days in a row on Streets of Willow without putting much strain on my system. One day at Buttonwillow is much more severe though. If you boil your fluid at all and get a spongy pedal, then you want to flush it immediately.
Forgot to say...check out this article for loads of good fluid info!:
http://www.stoptech.com/tech_info/wp...fluid_1a.shtml
If you do a full flush on the car, you'll go through 2 bottles. We usually recommend 3 bottles to our customers because we've found that most people want a spare on hand for a bleed. Some times, you have to bleed the car twice (or more) to get all of the air out of the system. Or, you if you take the car to the track and boil the fluid, you want to flush it out after or between days/sessions.
Also, if you open a bottle, you want to get rid of it after a month. Once it's opened, it starts to absorb water. We always date a bottle with a marker once we crack it open.
Finally, the frequency of bleeding depends entirely on use. If you're just daily driving and that's it, you can flush it out every 8-9 months with no issues. Once a year is even fine. If you're heating it up on a regular basis though (like track use), you'll want to keep it fresh. Depending on the tracks I'm driving, I bleed anywhere from 1 time per day to 3 events. For example, I'd do 3 days in a row on Streets of Willow without putting much strain on my system. One day at Buttonwillow is much more severe though. If you boil your fluid at all and get a spongy pedal, then you want to flush it immediately.
Forgot to say...check out this article for loads of good fluid info!:
http://www.stoptech.com/tech_info/wp...fluid_1a.shtml
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Originally Posted by dkmura
One last point: Motul brake fluid is a fine product, but is known to be very hydrophillic. Living in a humid climate like Scotland means you should plan to bleed your brakes twice a year to prevent any moisture from affecting the fluid itself.
David Muramoto
Sport Z Magazine Motorsports Editor
David Muramoto
Sport Z Magazine Motorsports Editor
The data showed that Motul RBF 600 lost about 40 degrees (going from memory, so the number may not be EXACT, but it is close) of boiling point temperature after 8 months in a car which was heat cycled through track events and normal driving in North Carolina. For street use, that is totally acceptable.
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