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Old 12-29-06, 02:53 PM   #1
Ymmie
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XT Disc Brake question

Is it possible to go to a auto parts store and buy some mineral oil for my XT disc brakes? I really hate spending $15 + shipping for only 50ml of mineral oil.
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Old 12-29-06, 03:50 PM   #2
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Try a drug store.

Heck,I might be tempted to try some mineral oil from a drug store.It is an old fashioned laxative,so you will know where to find it.Since it is pharmaceutical grade, it won't have any additives.The only downside is I suspect it is higher viscosity than the brake mineral oil your disc calls for.It also won't have whatever additives the brake folks use.
I don't think the auto parts guys will have pure mineral oil.
Luck,
Charlie
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Old 12-30-06, 06:04 PM   #3
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So the right mineral oil fluid costs $15.00 plus shipping. How much is it likely to cost you if you gum up your caliper or something like that?
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Old 12-30-06, 07:03 PM   #4
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Consider $20 or so cheap insurance and buy the Shimano oil. You really don't have to change it that often, if ever, so it's not like it's a huge expense.
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Old 12-30-06, 07:21 PM   #5
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Heat resistance might also be a factor.

Penny-wise and pound-foolish..?
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Old 12-30-06, 07:40 PM   #6
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Quote:
Originally Posted by rmfnla
Heat resistance might also be a factor.
Yeah, I thought about that. Also water absorbtion and maybe reaction with any residual oil in the pump, caliper and hose. It always surprises me how some people will pony up for a relatively expensive hydraulic disc brake set and then cheap out on the least costly part, the fluid.
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Old 12-31-06, 11:55 AM   #7
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I have 3 bikes to bleed meaning $15 x 3. Just trying to save a couple bucks is all but it looks like it's not really an option.
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Old 12-31-06, 01:45 PM   #8
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I have 3 bikes to bleed meaning $15 x 3. Just trying to save a couple bucks is all but it looks like it's not really an option.
More likely it'll be $15 divided by 3. It doesn't take very much fluid to bleed a bike disc brake.
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