Putoline sell a min oil... I use it.
i use Halfrauds LMH, ive been using the same bottle for years across a whole raft of brakes, not had any specific issues.
I think the lever feels slower, compared to a box fresh servo wave unit, but not enough to make me worry.
you certainly wouldnt notice out and about.
Does that mean reverb oil works in Shimano brakes?
Having ended up with numerous bottles of Reverb oil that's what I've been using in my Shimano brakes for a few years - works fine.
Anyone tried low viscosity industrial hydraulic mineral oil like Castrol Hyspin AWS? If it's good enough for critical hydraulic systems why not some brakes?
Viscosity is half LHM fluid, can be had for £10/l on ebay.
This stuff:
currently in stock at mantel here: https://www.mantel.com/uk/shimano-mineral-oil?autocomplete=1
9.99 delivery, but its only 14.99 so not horrendous especially if you need a few more things (up to £135) in the order.
Doh! I've 2 sets of brakes to bleed just done one and proceeded to empty my Shimano mineral oil into the Rockshox oil bottle next to it, same colour! Not sure I trust those eBay sellers selling "genuine" oil. Anyone bought any or fancy selling me some genuine stuff??
Where are you?
If you can get to Woking quite happy to let you use as much as a bleed needs... I got my Mantel 1l and have the last 100ml or so left of the last bottle.
I have 3/4l of Shimano oil now use Magura brakes so don’t use it
