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    DOT 5 Brake Fluid

    DOT 5 is higher viscosity that DOT 3/4/5.1 when at room temperature and above. This is easily visible in my test jar, and is confirmed by the various manufacturer's data sheets. At very cold temperatures DOT 5 is lower viscosity than DOT 3/4/5.1... a pretty desirable thing. This viscosity...
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    DOT 5 Brake Fluid

    Put a teaspoon of the fluid into a small jar of water, and then swirl it around a bit. If it is DOT3/4/5.1, it will vanish into the water without a trace. If it is silicone DOT5, it will spread out on the surface and shimmer. You will know it when you see it. I have a little jar of 50:50...
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    DOT 5 Brake Fluid

    Air and DOT 5 are only a problem if you shake them up. Pressure bleeders don't cause any problems at all. DOT3/4 have problems with air contact because they are naturally hygroscopic. -Chuck
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