Shimano mineral oilhandy 1 litre container of shimano hydraulic mineral oil for the proper maintenance of shimano hydraulic disc brakes featuresshimano recommend that you only use genuine shimano hydraulic mineral oil in shimano hydraulic disc brake systems mineral oil brake fluid is environmentally friendly and non corrosivea 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products buy shimano components from chain reaction cycles