So che sono passati anni, scusa se tiro fuori sto messaggio, ma ho fatto un po' di ricerche sul forum circa l'olio citroen per il mio impianto shimano. CI sono topic del 2010 circa in cui consigli LHM, qui invece lo sconsigli.. Cioè, anche giustamente, dici che per i freni meglio stare sul sicuro.. Cosa ti ha fatto cambiare idea?
Mi ha fatto cambiare idea che a quei tempi ignoravamo certe cose, tipo punti di ebollizione e stabilità dell'olio, cosa potesse fare dentro un impianto, molti facevano test empirici, che potevano essere convincenti.
Adesso che ho informazioni precise, ti dico che è consigliabile usare olio Shimano, e non altro.
Qui parla Nik Murdick Lead Multi Service Technician Shimano, uno con due palle davvero grosse, ed altri competitors:
"Can consumers use fluids other than your specific branded fluid in their brakes?!
Formula: ONLY AND ALWAYS DOT4 brake fluid! Different brand can be used of course. Shell is recommended.
Hayes: We recommend only Hayes branded fluid, because all our validation and laboratory testing is performed with our Hayes fluid. Other fluid brands may perform acceptably, but without test data to verify the performance we cannot endorse their use.
Hope: Our customers can use other brake fluids with all our products, however, we generally recommend only DOT4 or DOT5.1 as alternatives. Both fluids are widely used in the car and motorcycle industry so are easily available at most good cycle and car shops. DOT3 can also be used if none of the above are available.
Magura: No, no other fluids can be used, even mineral oils, as they may damage the seals due to different chemical properties, letting the seals shrink or expand.
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. It’s 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 “proprietary brake fluid” but I guess that doesn’t 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. I’ve 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.
There are third party companies that make mineral oil brake fluid and it says right on the bottle that it is compatible with all mineral brakes. Shimano has never approved a third party brake fluid to be compatible with our brakes and we never will. How is it possible that one fluid can work in both Magura and Shimano brakes if Magura fluid destroys Shimano brakes?
SRAM: We recommend only DOT 4 and DOT 5.1 fluids, but DOT 3 can also be used without affecting the seals or anything else in the system.
https://www.bikerumor.com/2013/04/1...-down-and-implications-for-road-disc-updated/