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  1. #1
    mtbr member
    Reputation: hrbib21's Avatar
    Join Date
    Apr 2013

    Hydraulic Brake Mineral Oil

    What kind of mineral oil is in the Guardian brakes? I assume it isn't the drugstore kind. One of my levers is quite loose, I have to pull it in quite a bit to get it to grab, so I want to do a bleed.

  2. #2
    Reputation: jhazard's Avatar
    Join Date
    Aug 2004
    Tektro advises against it:

    "...Tektro disc brakes are designed to be used with only Tektro brand mineral oil. Tektro uses a special additive to increase the temperature range and red color for ease of identification"

    While you can probably get away with drug store mineral oil, it's probably not the best practice. You can get an entire bleed kit for less than $15:

    Tektro MTB Hydraulic Disc Brake Bleed OIL Service KIT FOR Auriga Auriga Comp | eBay

    and Tektro Mountain Bike Hydraulic Disc Brake Bleed Oil Service Kit: Sports & Outdoors

    Hope that helps!
    Cool BandolArrow

    Jerry Hazard website

  3. #3
    mtbr member
    Reputation: UEDan's Avatar
    Join Date
    Apr 2010
    If it's anything like Shimano's mineral oil system, DON'T use drug store stuff.
    But at that price for the kit, screw Pentosin have at it.

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