Re: Shimano Hydraulic Brakes Mineral Oil

Postby swtchbckr on Tue 17/Apr/12 1:07pm

jo wrote:Not too worried about warranty at this stage.... :paranoid:

+1
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby Wobbler on Tue 17/Apr/12 2:13pm

Dr. Fuentes wrote:
RugbySucks wrote:Can anyone visiting this forum, honestly elaborate for the benefit of everyone watching, in laymans terms, what the difference between Shimano Mineral Oil, and Castrol Mineral Oil actually is ??


In terms for the layman, as requested:


:lol: Best post ever.
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby swtchbckr on Tue 17/Apr/12 4:28pm

so, if DOT fluid is so bad, being toxic, caustic and absorbing moisture etc, why doesnt every brake system use Mineral Oil??


"Because HSMO is petroleum based, systems designed
for its use also require seals made of special rubber"

is this the only reason?
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby danose on Tue 17/Apr/12 4:54pm

swtchbckr wrote:i've been running my Shimano BR555's now for just about 10 years now, and have never bled or changed the oil. i've always just followed the 'if it aint broke dont fix it' adage with them, and they seem to still just work fine. would i experience better braking if i did actually get off my arse and change the oil???


I finally bled my 04 m535s last year (not cos they needed it - just cos I was shifting them to a new frame which required an uber long line) - heaven's gates didn't open, the angel's didn't sing and my brakes didn't suddenly double in power

so yeah - if it ain't broke.....
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby snr_merv on Tue 17/Apr/12 5:09pm

.I. wrote:
Dr. Fuentes wrote:
RugbySucks wrote:Can anyone visiting this forum, honestly elaborate for the benefit of everyone watching, in laymans terms, what the difference between Shimano Mineral Oil, and Castrol Mineral Oil actually is ??


In terms for the layman, as requested:

Ok so you know the difference between engine oils and brake fliulds..well done

Now explain the difference between shimano mineral brake fliud and castrol (or any other brand for that matter) mineral brake fliud ?

You save a couple of bucks by buying an unknown alternative, thus you're a hero to consumers everywhere, congrats.
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby snr_merv on Tue 17/Apr/12 5:13pm

swtchbckr wrote:so, if DOT fluid is so bad, being toxic, caustic and absorbing moisture etc, why doesnt every brake system use Mineral Oil??


"Because HSMO is petroleum based, systems designed
for its use also require seals made of special rubber"

is this the only reason?

Avid state the availability of DOT fluid around the world in random service stations being a key reason they use it.
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby RugbySucks on Tue 17/Apr/12 5:22pm

Dot fluid is apparently more stable in harsher conditions, from extreme cold to high heat. But, you pay for it with toxicity.

Don't really know how Mineral oil is all that different.

If you are stupid enough to drink either type of Oil, your chances aren't all that good, for enjoying another ride or meal.

:alien:
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby toominator on Tue 17/Apr/12 9:20pm

Dr. Fuentes wrote:In terms for the layman, as requested:


Magnatec isn't mineral oil, it's semi-synthetic. The GTX range might have been a better example :lol:
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby Fraser on Tue 17/Apr/12 9:58pm

Car engine oil is not the correct shit.
The other oil you could use is Citroen LHM oil. It is used in the suspension of the hydraulics of Citroens and is mineral based so this won't effect the seals. I wouldn't mix any of these. Just the same as you don't top up your cars brake fluid with a different DOT, you flush the whole system with it. Brake fluid (DOT glycol) is hydroscopic so it absorbs water from the air/pipes/seals and this will rust/corrode the internals of your brake system if it isn't designed for it. Which is why you need to change the brake fluid on your car every couple of years. Spill any on the paintwork and even when you repaint it the fluid will etch back thru. The reason cars/bikes go to all this hassle of using DOT it is because when they used plain hydraulic oil this boils and causes vapour locks or brake fade.
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby musket on Wed 18/Apr/12 1:46am

snr_merv wrote:
swtchbckr wrote:so, if DOT fluid is so bad, being toxic, caustic and absorbing moisture etc, why doesnt every brake system use Mineral Oil??


"Because HSMO is petroleum based, systems designed
for its use also require seals made of special rubber"

is this the only reason?

Avid state the availability of DOT fluid around the world in random service stations being a key reason they use it.


This is particularly handy, given Avid's amazing ability to need continuous bleeding and propensity to leak.
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby Dr. Fuentes on Wed 18/Apr/12 9:36am

toominator wrote:
Dr. Fuentes wrote:In terms for the layman, as requested:


Magnatec isn't mineral oil, it's semi-synthetic. The GTX range might have been a better example :lol:


:lol:

Damn, it was the first thing to pop up for me on the google :D
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby swtchbckr on Wed 18/Apr/12 9:44am

i was more thinking just in general, ie, all braking systems, cars too. I wondered if maybe its cos Mineral Oil is a bit more asspensive... cos the disadvantages of DOT seem to outweigh those of Min Oil.
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby cruiser on Wed 18/Apr/12 9:46am

boiling point/ performance?
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Re: Shimano Hydraulic Brakes Mineral Oil

Postby Fraser on Wed 18/Apr/12 5:05pm

cruiser wrote:boiling point/ performance?
yeah don't let that get in the way of this.
This remined me of the level of common sense we are dealing with here.
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