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https://www.amazon.com/Shimano-Internal-Hub-Maintenance-Oil/dp/B00O58QCQY

I know what it is for. But what is it composed of?

Móż
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Ralph G
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  • Mainly it's simply oil with the right "weight" to be optimal in a geared hub. It also contains a bit of dye, presumably to help identify leaks. – Daniel R Hicks Nov 07 '16 at 01:04
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    If you're asking whether it's worth 63 bucks, probably not. But you'd have to figure out what the equivalent weight gear oil would be. – Daniel R Hicks Nov 07 '16 at 02:39

2 Answers2

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I am not 100% sure for Shimano but my Rohloff Hub used SAE 80 weight gear oil. I can't imagine shimano has magic that isn't covered by the SAE standard.

dafew
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    I use many litres of ep80/90 in my old landrover, and it has a particularly distinctive smell. – Criggie Nov 07 '16 at 18:11
  • Here is a link to a blog post of a Shimano IGH rebuild that uses automobile automatic transmission fluid... http://www.14degrees.org/shimano-alfine-8-speed-internal-gear-hub-oil-bath/ – dafew Nov 07 '16 at 19:35
  • Just because you could use ATF doesn't mean you should. I'm positive that using the wrong oil (okay, not using the branded right oil) will void the remaining warranty. – Criggie Nov 07 '16 at 21:28
  • This answer misses the important point that Rohloff oil comes with a detergent wash to be applied and drained out as a first step, where the Shimano dunk procdure has nothing like that. It's been speculated that Shimano dunk oil has a detergent mixed in. – Nathan Knutson Oct 28 '22 at 16:01
  • Yes. But what exactly is the genuine Shimano nexus oil? I know you can use trans-fluid. The closest thing I thought it could be was...

    https://www.trademe.co.nz/a/motors/boats-marine/parts-accessories/other/listing/3837284309?gclid=Cj0KCQjwnvOaBhDTARIsAJf8eVPDu9l_sjDyHRF_XyDaEbm2ctElpgcbBL896tQ9UyxwuPHTF6VceQcaAhM8EALw_wcB&gclsrc=aw.ds

    as it's the same color blue and it's application is a salty watery environment.

     – Ralph G Oct 30 '22 at 05:48
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You don't have to use shimano original oil. I changed my Nexus 8 from grease to oil lubricant and the result is really fantastic. I'll never use grease again (of course grease is used for the ball rings). I took oil with the same specifications as mentioned in this video. I paid 14 Euros per liter.

Michael
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  • Hi, welcome to bicycles. The question was asking specifically about the composition of the Shimano-branded oil. Do you have any information that's relevant to the question? – DavidW Oct 28 '22 at 15:25