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Brake Fluid. What do you use?


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Hey guys, I’m looking to do a brake fluid bleed/flush on my V7 STi. It has the stock brembos.

I noticed the reservoir cap says DOT 3 only and I’ve found it very hard to source any DOT 3 fluid.

My brake&disc guy advised that I could ‘upgrade’ to DOT 4 despite what it says on the cap but you can’t go down from DOT 4 to 3.

DOT 4 is pretty easy to source and I tend to use Castrol React or the motul stuff for other cars I’ve had.

What do you guys use and is it perfectly fine for me to bleed and replace with DOT 4?

Cheers.

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Pretty sure you just need to stay away from dot 5 as its silicone based fluid which messes **** up

I've got the Castrol React stuff in mine now, can't fault it yet. The Motul RBF600 stuff seems to get alot of praise

Edited by Andy_Mac
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 Andy_Mac said:
Pretty sure you just need to stay away from dot 5 as its silicone based fluid which messes **** up

I've got the Castrol React stuff in mine now, can't fault it yet. The Motul RBF600 stuff seems to get alot of praise

yes! 5.1 is the non-silicone version iirc (stand to be corrected / flamed if I'm wrong)

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 boon said:
What do you use the car for?

If you're not tracking it, anything DOT4 should be fine. Repco brand generic fluid will be totally sufficient.

Last time I bled mine I used Castrol DOT4.

More or less just a weekend cruiser. Some long trips. Very occasional casual 5-10laps on Puke possibly.

I used Castrol DOT 4 in my Civic Type R which I tracked quite often.

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