Quote:
Originally Posted by unclebilly
This means the elastomers that work with Dot 3/4 aren’t compatible with Dot 5 and vice versa as Higgins pointed out.
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I’ve heard versions of this for years. All I have to offer is that I haven’t encountered any sort of hydraulic system failure in 50 years of using DOT 5 in 356s and my VWs. I use DOT 4 in my 911 and change it every year or before every track day.