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RE: Dot 3/Dot4 Mis

> Dot 3 and Dot 4 brake fluids are usually NOT compatible.  Check the can
> carefully.  What brands are you mixing?  What can happen is that they
> will coagulate as they are made of different compound structure.  Read
... total horse-hockey!  DOT3 and DOT4 are compatible ... if you read the
cap on most fluid reservoirs it clearly states that DOT3 or DOT4 are
allowed.  DOT4 has a tighter specification than DOT3, but there won't be a
problem when you mix them ,,, you are just better to assume the DOT3 specs
for the mixture ...

... you are probably thinking about DOT5, which is silicone-based.

Steve Buchholz
San Jose, CA (USA)