Jump to content
  • Welcome To Mopar1973Man.Com

    We can see you are lurking about reading the forums and article databases. We happen to be one of the most friendliest Cummins support website on the planet. Come on and register and grab a inexpensive subscription plan. With that you can unlock even more for you. Technical support either by public forum, private support ticket, and even unlock phone support by Mopar1973Man. Mopar1973Man.Com will remain FREE to read forever!

Brake Fluid - Dot 3 or Dot 4? Recommendations welcome.


Recommended Posts

  • Board Of Directors

2001 3500 Dually.

 

Hi all just wondering what people are using for brake fluid and if there is any specific brake fluid that is idea for steep mountain driving.

 

I'm about to use Dot 4 on my cars as they need a fluid change and that appears to have a lower boiling point.

Link to post
Share on other sites
  • Administrator

Been using DOT 3 for years but requires changing and flushing the system every 30k miles. 

 

DOT 4 has better qualities being the boiling point is much higher and the capable of hold a bit more moisture before going south and losing boiling point temps. Moisture in any form is bad deal and will cause rubber failure and metal failure from oxidation.

 

DOT 5 I do not suggest being its a totally different fluid and it is silicone based and requires different types of seals and rubber possibly. This can't be mix with either DOT 3 or DOT 4. 

 

 

  • Like 1
  • Thanks 1
Link to post
Share on other sites
  • 7 months later...
  • Board Of Directors
On 2/9/2020 at 8:05 AM, Mopar1973Man said:

Been using DOT 3 for years but requires changing and flushing the system every 30k miles. 

 

DOT 4 has better qualities being the boiling point is much higher and the capable of hold a bit more moisture before going south and losing boiling point temps. Moisture in any form is bad deal and will cause rubber failure and metal failure from oxidation.

 

DOT 5 I do not suggest being its a totally different fluid and it is silicone based and requires different types of seals and rubber possibly. This can't be mix with either DOT 3 or DOT 4. 

 

 

I'm getting ready to flush my entire brake system and upgrade to Dot 4 fluid. 

 

Would you be able to tell me the capacity of the system so I can purchase the correct amount of fluid?

Link to post
Share on other sites
×
×
  • Create New...