DOT 5.1 is it worth the extra ? - Page 2 - Alfa Romeo Forum
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Re: DOT 5.1 is it worth the extra ?

Originally Posted by David C View Post
Yes just bleed it though as normal.

It will be very obvious when you get to the new fluid!!
Thanks David

Im looking for a local dealer now
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Re: DOT 5.1 is it worth the extra ?


Not sure it is worth going specifically for that fluid, especially if you do not change your brake fluid that often.

A normal DOT 5.1 fluid might be cheaper (even Halfords DOT 5.1 is half the price of the ATE Super Blue / Super Gold), easier to get and may exceed the wet and dry boiling points.

If you want to spend silly money on brake fluid then check Castrol SRF. It has a higher dry boiling point although a lower wet boiling point. And is about double the price of the ATE stuff.

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Re: DOT 5.1 is it worth the extra ?

You might want to read this from the AP Racing website. They should know a wee bit about brakes>
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Re: DOT 5.1 is it worth the extra ?

Originally Posted by Rockhopper View Post
All DOT rated fluids are not compatible, mix DOT5 with DOT5.1, 4 or 3 and you will start a chemical reaction that will cause solids to precipitate out of the mixture and stop the brakes working!

US Federal law requires that all DOT rated brake fluids are compatible with each other but I'm buggered if I can find the exact reference to confirm it.

When silicone fluid first appeared on the classic scene 20 or so years ago there were lots of tales about it not being compatible with the rubber or the glycol fluid and, if you were changing to silicone, you needed to replace every rubber part in the system and so on. Since then, loads of people have just bled through their brake systems and filled them with silicone with no problems whatsoever. An awful lot of the alledged problems with it can, in my view, be attributed to the likes of Lucas and Bendix who have a vested interest in you not buying it because they make the glycol stuff.

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