http://www.bikerumor.com/2013/04/11...-down-and-implications-for-road-disc-updated/
was zum?
Shimano: Absolutely not, mineral oil is an unfortunate term to use because it is so vague and generic. The term mineral oil can describe a lot of different compounds. Itâs kind of like the term salt, which refers to much more than just table salt. Most of us are probably aware that the mineral oil that you buy at the drug store is not the same as the mineral oil we use in brakes, but that extends to different brands of mineral oil brake fluid as well. We should really call it âproprietary brake fluidâ but I guess that doesnât have the same ring to it. I can tell you with absolute certainty that Magura fluid will destroy Shimano brakes in a very short amount of time. Iâve seen it happen several times. The rubber seals in the system have to be specifically designed to interact with a specific brake fluid. If you use a different fluid, the seals will interact differently. Specifically, when you put Magura fluid in Shimano brake, the lever feels spongy and the pad contact point changes because the square edge seal at the caliper is breaking free from the piston at a different time.
was zum?