Brake fluid is hygroscopic; over time, it naturally absorbs moisture—something almost every mechanic knows by now. For this reason, this vital fluid should be changed regularly, ideally every two years. Here’s the king of brake fluids, ATE DOT4 SL.6, suitable for all our rear-wheel-drive Opels. It comes in this 1-liter can, which is enough for a complete brake system flush.
It also boasts some impressive technical specs:
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