Which brake fluid do I need ?

[AntStark]

My 3.0 has DSC so am I right I need a Dot4 LV (low viscosity) brake fluid? What makes are people using or recommend?
Thanks

 

[Rudyrov]

I use DOT 3 in my 98'

 

[AntStark]

I use DOT 3 in my 98'

I won’t be doing that ..thanks

 

[MartinJ]

I use DOT 4 in my '97-1.9.

 

[AntStark]

Yeah the DSC needs LV not normal 4, so I got some of that from Opie

 

[Pond]

Yeah the DSC needs LV not normal 4, so I got some of that from Opie

Not seen that before. Can I ask why LV?
I have had a good few BMWs now with DSC and all have just used dot4.

The DSC as far as I am aware, just applies the rear brakes, individually, when needed to 'unskew' the car on the rear end. I don't see the reason for any different thickness of fluid.

 

[Peter1450]

Well I’ve been using the wrong fluid for the last 10 years

 

[AntStark]

I am sure in the great scheme of things it doesn’t matter too much but I read in multiple places cars with DSC need LV to work most effectively
From the Bentley manual

 

[Peter1450]

Every days a school day, I’d never even heard of “ low viscosity “ brake fluid until this thread

 

[Rudyrov]

AI Overview

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DOT 4 brake fluid has higher dry and wet boiling points than DOT 3, making it better for high-performance vehicles and demanding driving conditions. While DOT 3 is suitable for normal driving, DOT 4 can withstand higher temperatures before boiling, which reduces brake fade. You can typically use DOT 4 in a system designed for DOT 3, but you should not put DOT 3 in a DOT 4 system.

This video explains the differences between DOT 3 and DOT 4 brake fluid, including their boiling points and how they perform under heat:

 

[AntStark]

Every days a school day, I’d never even heard of “ low viscosity “ brake fluid until this thread

Me neither ..it’s also called ‘ESP’ if you are after some . Anyway it arrived today from Opie ..looks and tastes like normal Dot4 to me

 

[Andyboy]

DOT4 every time.

 

[Peter1450]

Me neither ..it’s also called ‘ESP’ if you are after some . Anyway it arrived today from Opie ..looks and tastes like normal Dot4 to me

I’ll trust you on that one

 

[Pond]

looks and tastes like normal Dot4 to me

Ah, but being thinner, it should slide down easier.