Shimano Mineral Oil is strongly recommended for all Shimano Hydro Disc Brakes.
Will not attack painted finishes.
100ml is generally enough to do one complete set of brake bleeds.
NOT Interchangable with DOT fluid. DO NOT use Mineral Oil in DOT compatible brakes.
Mineral Oil vs DOT Fluids
Although Shimano made DOT fluid brakes in the 1960’s and ’70’s, our modern brakes use mineral oil. Mineral oil won’t harm painted finishes, and is less damaging to your skin and the environment. Chemically speaking, DOT fluid absorbs humidity from the air, and this absorbed moisture lowers DOT fluid’s boiling point over time. Shimano mineral oil starts at a higher dry boiling point than any DOT fluid specification. The boiling point of mineral oils won’t change over time because they don’t absorb moisture.
