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DOT 4 a substitute for DOT 3 brake fluid?

posted by  Zee on  Mon Jun 30 20:32 CST 2003
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last visit: Sat Oct 27 10:07 CST 2012
[RELATED]

I am used to replacing the brake fluid periodically. Whenever I do, I use Valvoline brand fully synthetic DOT 4. (Now the ABS formula -- whatever.)

So this weekend I changed the fluid in my '95 Ford Contour. That car calls for DOT 3 fluid.

Maybe I read the Valvoline label wrongly, but it does say "exceeds DOT 3 and 4"

So, was I safe to have used DOT 4 in there, figuring it is "more better" given it has higher specs than DOT 3 (and many DOT 4 brands)?

I ask this because the test drive revealed a definite pulsing of the ABS system at all times, not just heavy braking. Much more rapid than pulsing brakes like you get from warped rotors. Don't think I am feeling that.

Or, could it be that bleeding an ABS system causes some problem with the ABS unit and it remains "On" all the time?
--
"Can't understand why people abort Volvos, either"






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