Brake Fluid

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spetz
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Brake Fluid

Post by spetz »

What is some really good brake fluid for the FTO brakes?

And what is the difference between DOT 3, 4 and 5?
afterburner
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Post by afterburner »

All the recommendations I have read advise against using DOT 5. A good quality DOT 4 fluid is your best bet.

Have a read here:

http://www.0800brakes.co.nz/pg8.htm

It's a bit biased towards their products, but has a lot of useful information about fluids and brakes in general.

The DOT number is a measure of how readily the fluid absorbs moisture - the higher the number, the less moisture they will absorb over a given period. DOT 5 is a silicone fluid which does not absorb moisture at all - this is good in that it makes the fluid last longer, but bad when the pockets of water in your brake lines vapourise under high heat - it can get exciting when the pedal goes straight to the floor 8O

I use Elf DOT 4 fluid (have also used Motul as well) - both are very good.
[url=http://www.atom.net.nz/afterburner/fto/index.htm][img]http://www.atom.net.nz/afterburner/ftologos.jpg[/img][/url]

It's gone :( - now carless...
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RichardH
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Post by RichardH »

You can get DOT 5.1 as well. This is compatible with DOT 4, and isn't silicone based.

- Rich
Breza
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Post by Breza »

What is some really good brake fluid for the FTO brakes?
Whatever is qouted in the owners manual should suffice for normal driving conditions and you can probably pick it up at SuperCheap ar other parts store..................saying that, I don't have a owners manual handy.

Personally I use Castrol SRF as I enjoy the odd weekend spirited drive in the Tasmanian countryside and plan to do a couple of track days in the near future.

Chris
DarkRain
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Post by DarkRain »

The different DOT ratings represent the dry and wet boiling points of the brake fluid. DOT 5.1, DOT 4 and DOT 3 are similar glycol based brake fluid whereas DOT 5 is silicon based and are not compatible with the glycol based and not suitable for brake systems with ABS.

DOT 5.1 has similar wet and dry boiling points as DOT 5 brake fluid and therefore is superior to DOT 4 and 3. Similarly DOT 4 standard is better than DOT 3. There are also better brake fluids than DOT 5.1 with very high boiling points, especially the wet boiling point, like the Castrol SRF (definitely one of the best and very expensive - US$65 per litre) mainly used for racing as they are expensive. Cheaper and more reasonable one is Motul RBF600 with high dry boiling point and a wet boiling point better than DOT 5.1
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