Recent Topics
newer tire in the back arguement
by 08sienna
04/20/14 09:24 PM
'98 Toyota Avalon - Glove Box blub fitment problem
by mercuryblues
04/20/14 08:44 PM
Lead and Crime
by Sam2000
04/20/14 07:49 PM
2015 Outback - Subaru drops the MT and AT
by buster
04/20/14 07:46 PM
PL14477 Autopsy
by earlyre
04/20/14 07:35 PM
1995 Buick Roadmaster's upcoming 60K mile service
by 10WSmuckers
04/20/14 07:23 PM
what does mopar code C1041 mean?
by SLATRON
04/20/14 06:40 PM
Stens 120-345 cut open
by DSparks
04/20/14 06:35 PM
What is replacing the General Altimax HP?
by tommygunn
04/20/14 06:33 PM
Reputable info on minivans??
by JHZR2
04/20/14 06:03 PM
weekend project / whats it worth? Honda HRT216KSDA
by volk06
04/20/14 05:53 PM
Wash and wax on M3
by domer10
04/20/14 05:38 PM
Newest Members
Delta, bnd, hammere30, SpartanSoul, jriordanzoom
49642 Registered Users
Who's Online
141 registered (1345, 08sienna, 74DartSport, 123Saab, 10WSmuckers, 06AllAmerican, 12 invisible), 1911 Guests and 170 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
49642 Members
64 Forums
212181 Topics
3325724 Posts

Max Online: 2605 @ 04/19/14 12:41 PM
Donate to BITOG

Topic Options
#1824342 - 03/20/10 11:26 AM Shelf Life of Brake Fluid - opened vs. closed
chefwong Offline


Registered: 07/17/03
Posts: 712
Loc: New York
In your opinion....what is the shelf life of brake fluid

- open in sealed tin can
- closed in plastic bottle
- open in plastic bottle

Just curious how long I can keep/use the latter in it's respective applications. I use ATE 200, Motul RBF600 and Castrol SRF. Cars using Motul and SRF get fluid chaned frequently. Street cars using ATE 2 years...1 year if I have time.


Just curious what is the longevity of shelf life in open or unopen applications..

Top
#1824353 - 03/20/10 11:38 AM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: chefwong]
Deltona_Dave Offline


Registered: 02/01/10
Posts: 767
Loc: Deltona, FL USA
I would think that factory sealed, it should be good for a few years. Open and tightly closed in Florida humidity (where I live) would be about a year in plastic or metal containers. I write the date I opened it on the bottle. Brake Fluid is pretty inexpensive, so I dispose of it properly after roughly a year, since it will absorb humidity and moisture (I forget the tech term for it).
_________________________
2009 Volkswagen GTI 6 Manual.
2005 Chrysler Sebring Convertible Touring.
2011 Ford Fiesta 6 spd DCT.



Top
#1824367 - 03/20/10 11:48 AM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: Deltona_Dave]
Bluestream Offline


Registered: 09/13/03
Posts: 3613
Loc: Waterloo, ON
In a tin can, a long time, maybe indefinate. In plastic 5 years according to Castrol. Open can; I would agree on a year or so. I'm not as anal about open containers as I used to be. Shop I used to go to had it kept in a one gallon tin can with a hole punched in the top of the can to allow the pump to pump out the fluid.
_________________________
1999 Grand AM 2.4 A4
2000 VW Beetle 1.8T M5
2000 Ford Explorer 4.0 4X4
1991 BMW 735iL
"A fool and his money are soon parted" - Thomas Tusser

Top
#1824458 - 03/20/10 12:48 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: Bluestream]
widman Offline


Registered: 05/27/02
Posts: 2982
Loc: Bolivia
Once it is opened, you have cut it seriously. use a little and close it tightly in a dry climate, fine. Every time you open it to look at it or take out a drop, you let humidity in.

Want to play?
In a humid climate, open a bottle and just leave the top off. it will overflow by the next day. That is water being absorbed that reduced the boiling point and makes it thicker.

I frequently see 5 or 6% in problem systems, but once it hits 25% the fluid is so thick it is hard to pump.
_________________________
Richard's Car Restorations

Top
#1824593 - 03/20/10 02:22 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: widman]
chefwong Offline


Registered: 07/17/03
Posts: 712
Loc: New York
Go figure....for those that are participating in this thread I'm going to assume you may follow similar brake flush schedules like I do....


I take brakes and tires very seriously...

And then there is the majority which I had to guess probably not have flushed their system in 6 years...

Top
#1826844 - 03/22/10 12:02 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: chefwong]
dailydriver Offline


Registered: 03/14/06
Posts: 6525
Loc: Bucks County, Pa.
Originally Posted By: chefwong
And then there is the majority which I had to guess probably not have flushed their system in 6 years...


...or my brother, who has not flushed, nor changed his in 11 YEARS!!! (In his daily driver/beater) crzy
_________________________
2000 Z28 1SC 6 speed 165K HARD miles!
Sustina 0W-20, M1 0W-40 (60/40 mix), Amsoil EaO 64 filter
Millers CRX 75-140 NT/4oz. XL-3, RL MTL, 11S

Top
#1826847 - 03/22/10 12:06 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: Deltona_Dave]
dailydriver Offline


Registered: 03/14/06
Posts: 6525
Loc: Bucks County, Pa.
Originally Posted By: Deltona_Dave
Brake Fluid is pretty inexpensive, so I dispose of it properly after roughly a year, since it will absorb humidity and moisture (I forget the tech term for it).


I believe hygroscopic is the term you are looking for.

And the italicized part of your post indicates that you most definitely are NOT a Castrol SRF user!!
_________________________
2000 Z28 1SC 6 speed 165K HARD miles!
Sustina 0W-20, M1 0W-40 (60/40 mix), Amsoil EaO 64 filter
Millers CRX 75-140 NT/4oz. XL-3, RL MTL, 11S

Top
#1827585 - 03/22/10 10:32 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: dailydriver]
crinkles Offline


Registered: 05/28/07
Posts: 5460
Loc: australia
just throw away unused portions. always use from fresh bottle.
_________________________
Pennzoil SUV 5w-30

Top
#1827606 - 03/22/10 11:00 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: crinkles]
sciphi Online   content


Registered: 03/24/07
Posts: 8070
Loc: Upstate NY
I have a lot of unused fluid after replacing all the hard lines on my car. That fluid wasn't touched for 10 years. It was nasty.

Good to know the fluid I buy on the shelf is still in okay shape.
_________________________
2009 Honda Fit Sport
2012 Chevrolet Cruze Eco

Top
#1827778 - 03/23/10 07:08 AM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: sciphi]
KrisZ Online   happy


Registered: 12/23/06
Posts: 4003
Loc: Toronto, Canada
Tht's why I don;t keep any brake fluid around, I never need it except when I flush the system. It usually takes a little over 0.5 quarts to flush the system completely, and I toss recycle what's left over.
_________________________
2006 Mazda3 2.0 - 180,000 Km
2003 Ford Focus ZX5 2.0 Zetec - 150,000Km
Both on good old dino juice smile

Top
#1828337 - 03/23/10 03:27 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: KrisZ]
eljefino Offline


Registered: 06/15/03
Posts: 22961
Loc: ME
The stuff in your car's plastic reservoir is good for two years so IMO an opened container with the lid on is good for at least that long.

Since it turns brown/black as it ages, compare the bottle to the reservoir. If it's more clear, you're improving things by adding it. (Though any off tint would have me chuck it.)

Top
#1833362 - 03/27/10 07:30 AM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: eljefino]
widman Offline


Registered: 05/27/02
Posts: 2982
Loc: Bolivia
Originally Posted By: eljefino
The stuff in your car's plastic reservoir is good for two years so IMO an opened container with the lid on is good for at least that long.

Since it turns brown/black as it ages, compare the bottle to the reservoir. If it's more clear, you're improving things by adding it. (Though any off tint would have me chuck it.)


two years in the car as long as you look at it through the plastic, not taking off the top to "see better". But in the car the air you close in is a few ml.

In the bottle, if it is half full, you are locking in 6 ounces of moist air that will be absorbed. if you then open and take out an ounce, you are locking in another 7 ounces of moist air.

As one guy once told me: "This is a great product. Each week I top off my brake fluid and the bottle never empties."
_________________________
Richard's Car Restorations

Top
#1847741 - 04/06/10 08:31 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: widman]
PandaBear Offline


Registered: 08/05/02
Posts: 12161
Loc: Silicon Valley
They should start selling them in plastic pouches instead of bottle, so no air can get in.
_________________________
"You keep asking questions PandaBear and you'll end up a vegetarian like my wife" - Camu Mahubah

Top
#1847752 - 04/06/10 08:39 PM Re: Shelf Life of Brake Fluid - opened vs. closed [Re: PandaBear]
cjcride Online   content


Registered: 11/06/09
Posts: 528
Loc: Ontario Canada
^+10
_________________________
2004 Corolla



Top