Results 1 to 15 of 15
  1. #1
    mtbr member
    Reputation:
    Join Date
    Sep 2012
    Posts
    6

    Shimano mineral oil

    Hi all!

    I'm trying to find the best allternative fluid for Shimano hydraulic oil. I've have talk to a specialist and he said that it is theoretically possible to find synthetic fluid without an alchokol (which has in DOT), but he need to know oil specification.

    Is there anybody who knows where to find oil specification?

  2. #2
    mtbr member
    Reputation:
    Join Date
    Aug 2008
    Posts
    3,267
    Pentosin 7.1. Used in Audis and most German cars for power steering fluid. This one canister will last you a lifetime. Even better if you drive a German car so you can use it in there too.

  3. #3
    mtbr member
    Reputation:
    Join Date
    Oct 2009
    Posts
    898
    I'm using Johnson's Baby Oil in mine :-)

  4. #4
    mtbr member
    Reputation: mitzikatzi's Avatar
    Join Date
    Sep 2008
    Posts
    1,811
    I wouldn't use "baby oil" or mineral oil from the Drug Store. YMMV

    This has been done before there are a couple of good threads on it, Search
    Duct tape iz like teh Force. It has a Lite side and a Dark side and it holdz the Universe together.

  5. #5
    mtbr member
    Reputation:
    Join Date
    Oct 2009
    Posts
    898
    Quote Originally Posted by mitzikatzi View Post
    I wouldn't use "baby oil" or mineral oil from the Drug Store. YMMV

    This has been done before there are a couple of good threads on it, Search
    Yeah I've read them.

  6. #6
    mtbr member
    Reputation: BustedBearing's Avatar
    Join Date
    Apr 2011
    Posts
    276
    What's the problem with using Shimano oil?

  7. #7
    One Gear
    Reputation: .40AET's Avatar
    Join Date
    Jun 2007
    Posts
    1,041
    Quote Originally Posted by BustedBearing View Post
    What's the problem with using Shimano oil?
    Nothing but the price. You'd expect it to glow and be able to power a small city for the price they charge for a thimble full of it.

  8. #8
    mtbr member
    Reputation: BustedBearing's Avatar
    Join Date
    Apr 2011
    Posts
    276
    I've recently bought 1L for 15.90. Didn't find it that expensive for an oil to be used on such a specific application. Considering that if I had to go look for other alternatives I would easily spend the difference on fuel and time. And I would bet a liter of similar mineral oil wouldn't be that much cheaper...

    Do you guys pay more for it or was I just lucky?

  9. #9
    mtbr member
    Reputation:
    Join Date
    Jun 2012
    Posts
    119
    Quote Originally Posted by BustedBearing View Post
    I've recently bought 1L for 15.90. Didn't find it that expensive for an oil to be used on such a specific application. Considering that if I had to go look for other alternatives I would easily spend the difference on fuel and time. And I would bet a liter of similar mineral oil wouldn't be that much cheaper...

    Do you guys pay more for it or was I just lucky?
    Around the same online in the US. $17-20 or so. I personally feel like its worth it to cough up, because it's better safe than sorry with expensive and specialized equipment like hydraulic bicycle breaks. YMMV

  10. #10
    mtbr member
    Reputation: Jbravo44's Avatar
    Join Date
    Sep 2012
    Posts
    13
    auto grade is great! keeps moisture out too

  11. #11
    mtbr member
    Reputation: gmats's Avatar
    Join Date
    Apr 2005
    Posts
    1,922
    Aloha, just an observation here. I know there is a company out there that is making the mineral oil for Shimano. Even if Shimano had their own chemists making it, I cannot imagine how their quantities would even come close to what Pentosin puts out for the auto industry alone. Many of these companies also have other industries they produce for. Anyway, so BULK probably equates to lower manufacturing costs which could also help explain why Shimano stuff costs more than other stuff.

  12. #12
    mtbr member
    Reputation: Spicy.Mike's Avatar
    Join Date
    Jul 2012
    Posts
    24
    Nice comment on the Pentosin...luckily I have that stocked in our cabinets for our Mercedes.

    Mineral Oil from Pharmacy/Store = Laxative. Heavier and Wrong Additives.
    Autograde, High Wt = Good, with Additives to promote function, but will slug down your performance.
    Autograde, Low Wt = Best Similarity, Additives, will mimic the same thing as Shimano which is MOST likely the same.

    I guarantee that Shimano did put some very mild research into their fluid. The company has the strictest testing procedures for their products, which makes me think they would atleast give consideration to their "Mineral Oil". Their oil probably has 1-2 extra additives, on top of the low WT. Then they rebrand it. Won't see any difference from a good autograde M-Oil.
    Easy Does It.

  13. #13
    DIY all the way
    Reputation: Mr.Magura's Avatar
    Join Date
    Aug 2010
    Posts
    2,411
    Back in the day when the Magura hydro stopper brakes came out, they didn't sell their own fluid, but had a list of oils that fit the bill, on the last page of the manual.

    Quoted from the manual:

    (Citroen) Pentosin LHM
    Castrol LHM 1756

    Later on they figured it paid off to sell it as their own brand, at 20 times the price

    Magura

  14. #14
    mtbr member
    Reputation: Spicy.Mike's Avatar
    Join Date
    Jul 2012
    Posts
    24
    ^ Just another piece of evidence that any Mineral Oil that fits for auto applications with a low wt. will work.

    Mineral Oil is Mineral Oil, no matter what. Sure the Grocery M-Oil shouldn't be used. But for Automotive/Engineering applications (low wt) they'll all contain the few but similar additives. It's not like they would make a M-Oil for cars that would deteriorate the linings/o-rings/inner parts...As a company, they would create M-Oil for maximum efficacy that provides a great standard of use. Pentosin is good, as they are used for German's Power Steering fluid and directly use them (no problems). I'm sure if that oil can withstand that type of hydraulic movement it can surely be used in a simple, sealed Hydro Brake.
    Easy Does It.

  15. #15
    mtbr member
    Reputation: Spicy.Mike's Avatar
    Join Date
    Jul 2012
    Posts
    24
    I've done some research now. I think this is a great "f-you Shimano for overcharging rebranded M-Oil Castrol Oil" (their components are good however).

    Pentosin actually differs a bit from most hydraulic fluids with its rating @ "18 cSt@40C/6.0 cSt@100C/VI 340." So it's thinner than Castrol Brand.

    What's great about Pentosin is that its functional down to -40c. You'd be frozen by then and dead. Also, it'll work to 110c, past boiling point. So, great for variable environments..not that you should be in those environments in the first place....You get what I'm saying. Plus, I read an article that Pentosin is incredibly light, more so than other fluids, including Shimano's M-Oil. One should actually see an increase in performance from using Pentosin 7.1 or LHM Plus (Green). Do NOT use the CHF11S.
    Easy Does It.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •