Reply to "Changing Brake Fluid"

Silicone fliuds are more viscous than mineral oil, so its extremely hard to bleed air out of them. Microbubbles stay in forever seemingly, which may be the cause of its altitude sensitivity. A well-publicised rod-run to Big Bear Mountain in So-Cal took place quite a few years ago, and almost every car with silicone fluid lost its brakes at 7000 ft of altitude. After being flat-bedded at great expense back to L.A, the brakes miraculously returned.... A few classic cars that used silicone fluid found that water still gets in the lines but does not mix, when the water froze while the car was stored in an unheated garage, and split a line. Finally, consider: not one racing association approves silicones and a few absolutely prohibit it's use. Even pro-racers stay away, and if there were ANY advantage, the guys that race for money would've found it in the 35+ years its been around. All this is too high a price to pay so I don't have to change brake or clutch fluid yearly, IMHO