Home Forums Bike Forum PSA: LHM mineral oil from halfords for £3 per litre.

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  • PSA: LHM mineral oil from halfords for £3 per litre.
  • lovewookie
    Full Member

    As above. Some use it instead of shimano mineral oil. Bargain at £3 instead of £12 I think.

    Stedlocks
    Free Member

    Got a link? I just went in my local one and they knew nothing about it

    lovewookie
    Full Member

    oddly cant find it on the website….

    Mine was from the Bishopbriggs Halfords, in the motor oils section.

    only reference I can find is this review so it may just be old stock.

    sorry

    Scienceofficer
    Free Member

    LHM works fine, but shimano fluid is less viscous and makes for a better feeling brake IMO.

    matthew_h
    Free Member

    I would strongly advise against using anything other that Shimano fluid in a Shimano brake. I’ve seen a couple of brakes with knacked seals due to this.

    simonbowns
    Free Member

    Oops, wrong autofill login on the shop computer, sorry Matt!

    Scienceofficer
    Free Member

    Not with LHM you haven’t. Its perfectly compatible with the seals. I expect you’re thinking of DOT based fluids.

    timbur
    Free Member

    Been using that there LHM in Shimano brakes for years and not had one failure. They actually made my 26” rigid SS like a 27b boost plus after a full bleed 😈

    retro83
    Free Member

    Scienceofficer – Member

    Not with LHM you haven’t. Its perfectly compatible with the seals. I expect you’re thinking of DOT based fluids.

    I used the LHM stuff for years. I always thought the same as you.

    But since switching to using the proper Shimano fluid, I’ve had zero instances of sticky/uneven retracting pistons, where I was having to clean the pistons every few weeks to avoid uneven pad wear & rubbing. Purely anecdotal, I know.

    thisisnotaspoon
    Free Member

    Shimano’s argument is that they know what’s in their fluid, thy have no idea what’s in halfords, citoren, castrol, magura or anyone else’s. There could be additives deliberately designed to swell the seals on old cars slightly and seal up leaks/cracks.

    I like my argument from last time:

    paid £12 for the big (litre?) bottle 10 years ago and it’s barely 25% used!

    That’s a cost of about 25p/year.

    Other things costing 25p in biking terms:
    25% of an energy gel
    Petrol ued in the engine whilst running the portable jetwash.
    Spoke nipple
    Piece of ginger for baking carrot cake pre ride
    A shower at a trail center if you share with 4 other guys (or ladies).

    So other stuff might work, but the shimano stuff might work fractionaly better (lower viscocity, gaurenteed not to attack the seals, correct boiling point).

    And I don’t buy the “it works in a 3 ton rolls royce” argument, it may well do, but it probably has over a litre of fluid and pads 10mm thick insulating the fluid from the brakes. MTB’s have 1mm thick pads and 20ml of fluid. They also don’t have ABS, or damping unlike either car brakes or suspension.

    simonbowns
    Free Member

    Not with LHM you haven’t. Its perfectly compatible with the seals. I expect you’re thinking of DOT based fluids.

    Nope, I’m definitely thinking of LHM/other Mineral oils.

    Scienceofficer
    Free Member

    So, after a bit of reading, it seems that ‘LHM’ is a sort of generic descriptor for automotive mineral oil intended for hydraulic applications. As such, it can be quite variable in terms of additives, depending on its intended use. I’ve not had trouble with shimano brakes that I’ve used it in for the last 8 years (same bottle in that time) but other people may not be so lucky, depending on the actual product you use. In any event, I stopped using it because the brakes felt better with the proper stuff in.

    dirtydog
    Free Member

    So what makes LMH safe to use and non LMH oils unsafe, isn’t LMH just French for liquid mineral hydrolique or words to that effect?

    Mineral oils are not all the same, it’ a fact that Magura blue blood destroys Shimano seals!

    lovewookie
    Full Member

    and this is why I said ‘some’ use it 😉

    I’m using it instead of Cyclo mineral brake fluid. looks, smells and swirls (technical term…) the same 😉

    I know. I’m gonna die

    but then, so are you..

    jairaj
    Full Member

    I used Halfords LHM oils in Shimano brakes and found it harder to bleed and had a different lever feel to when Shimano branded oil was used.

    The caliper seals also failed about 2 months afterwards. No idea if it was related as the brakes were a few years old anyways.

    This was about 4 years ago so Halfords could have changed the ingredients in the oil since then.

    I think I must bleed my brakes once every 2 or 3 years so don’t mind paying a bit more for the little bottle of Shimano stuff.

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