I'm surprised that the brake fluid manufacturers haven't come up with a more suitable and affordable alternative. But then again I'm not surprised because it would mean selling at least half as many units, not to mention less work for the main dealer service departments religiously changing fluid at specified intervals. Just a thought based on working on and MOTing more modern vehicles with brake fluid that has clearly not been changed for in excess of 5yrs but still performs as it should when braking efficiency is tested. Also when driving such cars under normal conditions sustained braking at high speed is hardly ever encountered, which is what would be needed to generate enough heat in the brakes to raise the temp of the fluid to the point of it's moisture content boiling. From a safety point of view one high speed emergency stop is unlikely to generate these conditions. I can imagine that the majority of cars on the road have brake fluid over 2yrs old. I suggest it's something to keep an eye on but not a reason to panic every 24 months ;-)
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