I understand the stuff has a strong following among the collector car set, since these sorts of cars tend to sit in storage for extended periods. I guess glycol-filled systems do not tolerate sitting still very well. I have indeed seen calipers seized permanently in place after extended storage. Must be something to this...

Perhaps some day when I strike it rich, my E-type roadster will be filled with DOT5...

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1986 300E 5-Speed 240k mi.