Author Topic: DOT 4 Brake Fluid - longevity  (Read 1503 times)

Offline Vince in Milwaukee

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DOT 4 Brake Fluid - longevity
« on: April 29, 2018, 08:09:19 AM »
I have a couple of sealed containers of Dot 4 down my basement.  I'd say that they are about 2 years old.  Are they still okay to use, or even with being sealed, does some water still get in?  Thanks. 
1984 Moto Guzzi 850 LeMans III, 1986 California II
Gone but not forgotten:
1969 Moto Guzzi Ambo, 1994 BMW K75RTw/ABS, 1996 BMW R1100RT, and 1993 BMW K75

Offline Spokane2303

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Re: DOT 4 Brake Fluid - longevity
« Reply #1 on: April 29, 2018, 08:13:55 AM »
Same question from me!

Also, how about engine, transmission (gearbox) and final drive oils?

Offline pyoungbl

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Re: DOT 4 Brake Fluid - longevity
« Reply #2 on: April 29, 2018, 08:19:23 AM »
I'm pretty sure the liquids in those sealed DOT 4 containers are just fine.  Heck, they might well have been on the shelf of AutoZone for that long before I bought my last one.  As for the oil, that's certainly OK since oil is not hydroscopic (big college word to make me sound smart...just means that the oil does not absorb water from the air like brake fluid does). 

Peter Y.
Growing old ain't for sissies.

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Offline nbags

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Re: DOT 4 Brake Fluid - longevity
« Reply #3 on: April 29, 2018, 08:37:55 AM »
seal containers ok, once open 1 to 3 months i allway buy brake fluid in small containers so there is no left over.

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Re: DOT 4 Brake Fluid - longevity
« Reply #3 on: April 29, 2018, 08:37:55 AM »

Online Wayne Orwig

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Re: DOT 4 Brake Fluid - longevity
« Reply #4 on: April 29, 2018, 10:06:00 AM »
Better send it to me. I'll test it for you and report back in a few years.
Scientist have discovered that people will believe anything, if you first say "Scientists have discovered...."

Offline Bill Dee

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Re: DOT 4 Brake Fluid - longevity
« Reply #5 on: April 30, 2018, 12:20:09 AM »
I am OK with using Dot 4 that is old as long as it is sealed.  Old new oil is good as long as it is sealed too. 
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Online Huzo

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Re: DOT 4 Brake Fluid - longevity
« Reply #6 on: April 30, 2018, 02:58:01 AM »
I am OK with using Dot 4 that is old as long as it is sealed.  Old new oil is good as long as it is sealed too.
Don't know about y'all, but once I've dumped the front and rear brake fluid as well as the distilled cat's piss that comes out of the clutch m/c on my Norge and replace the whole shooting match, there's 3/5 th's of 5/8 th's of sweet bugger all left anyway, so I just give the rest the arse..!

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