Originally Posted by
vespasianus
The companies that use DOT fluid make this claim - Hayes for example. They claim that the occasional bubble you get in your brake is from the mineral oil bubbling. Every year or so, I "burp" my Shimano brakes by attaching the funnel to the brake lever and flicking the lever while tilting the bike. You get the bubbles out and you are fine to go for a while. Takes all of 5 minutes.
I will say that some of the DOT brakes (Hayes, Hope) are tons more powerful than the Shimano's and also have much better modulation. Not sure if it is the brakes or fluid.
I have both SRAM Force 1 (dot) and Shimano 8070 (Mineral oil) hydros and I think the power and modulation are comparable - I do not notice any significant difference. Both are excellent in my book. .