Brake fluid Change DOT 4 or?

**Novica** · 03-02-2016,04:38 PM

Hello,

Now it is time to change brake fluid. In service manual is not described which brake fluid is used only to ask my dealer.

As I am not going to dealer, I saw that on brake fluid reservoir and its cap is written DOT 4.

Do I need to use DOT 4 or some newer DOT (like 5 or 5.1)?

The car is Audi A6 2.0 TDIe, 100 kw, manual, 2011 CY.

Thanks for advises

Cheers Novak

**rowdy-999** · 03-02-2016,05:09 PM

DOT 4 is fine, however 5.1 is an 'upgrade'....higher boiling point etc.
Avoid DOT 5, it's mineral based and isn't suited for our motors.

**zollaf** · 03-02-2016,05:11 PM

5.1 is for race applications. 5 is silicon and should be avoided. stick to dot 4.

**rowdy-999** · 03-02-2016,05:19 PM

...but saying that you can get race DOT 4 fluids that have higher boiling points than 5.1s.

http://www.opieoils.co.uk/pdfs/tech-...-Explained.pdf

**micheal balbrig** · 03-02-2016,05:45 PM

When changing fluid, avoid any air getting into system or it will be difficult to remove

**Novica** · 03-02-2016,08:40 PM

Guys,

Many many many THANKS to all you, Rowdy, Zollaf, Micheal !!!

I will find DOT 4 and change it (I mean my mechanic will do it with some pressure thing).

Cheers

Novak

**SlackJack** · 03-02-2016,09:37 PM

I've always used dot 4 even on the bikes, always good.

**carlisu84** · 04-02-2016,06:44 PM

Dot 4

Desde mi CPD

**Novica** · 04-02-2016,06:50 PM

Thanks to All,

Brake fluid and oil has been changed today. I have bought Ate DOT 4 brake fluid and Shell Helix ECT 5W-30 engine oil and Mann filter for oil. Car is now completly servised

**royclark** · 04-02-2016,07:14 PM

Originally Posted by Novica

Thanks to All,

Brake fluid and oil has been changed today. I have bought Ate DOT 4 brake fluid and Shell Helix ECT 5W-30 engine oil and Mann filter for oil. Car is now completly servised

Don't forget power steering fluid.