[sperry]

Originally Posted by Dean

Not sure it is best at rejecting moisture, only that it has one of the best wet boiling points, which is quite different.

Also, as you press and release the brake, fluid is mixed, and also, hot fluid in the calipers has some circulation due to convection.

Either way, any moisture you can avoid putting in the system is good.

If you have a a 1l bottle 1/2 full, and you seal the cap when it is say 20% humidity, the brake fluid will absorb close to 100% of that moisture in the empty .5l of the can no matter what brand Dot 3-4 fluid. I think tha is relative humidity, even though they don't say so. So I'm not sure how much water that is, but it is some, and every time you open the bottle, more moisture gets in to be sucked into the fluid...

I won't use an open bottle of fluid for anything but the F150 clutch that has a leaking slave cylinder that is impossible to get to...

I hear what your saying.

Originally Posted by Dean

If you are going to the trouble to bleed them, why not pump a whole new bottle of Ford HD into the system for I think $4-6

Because you need to do it before and after every AutoX.