Don't! Brake parts are made from rubber that will absorb hydrocarbons and swell. If you must add something to limp home, go with the body fluids, undrunk beer, antifreeze, but not power steering, AFT, oil, gas, etc. Body fluids will lower the boiling point, and cause corrosion. However, after a complete flushing, the brake system should still work except for what ever caused the original loss of fluid. They are still using modern versions of what was available when hydraulic brakes were first available. Brake fluid is a water soluble poly glycol. AFT is parafffins or esters the same as motor oil, just lighter ones, or a leas without the VII.
We made a lot of progress in formulating rubber between the development of hydraulic brakes and automatic transmissions and power steering. There are even industrial brake systems that do use the hydrocarbons. I see no reason brakes couldn't switch, but the polyglycols are the way it has always been, and we mustn't confuse people by changing.
Best thing is to rebuild calipers and wheel cylinders every lining change or so and never have an emergency. Hoses eventually go, and in the rust belt, the steel lines too.
We made a lot of progress in formulating rubber between the development of hydraulic brakes and automatic transmissions and power steering. There are even industrial brake systems that do use the hydrocarbons. I see no reason brakes couldn't switch, but the polyglycols are the way it has always been, and we mustn't confuse people by changing.
Best thing is to rebuild calipers and wheel cylinders every lining change or so and never have an emergency. Hoses eventually go, and in the rust belt, the steel lines too.