What is the correct BRAKE FLUID for my '49 Plymouth?

[mikeintx]

I have an all original 1949 Plymouth Special Deluxe Convertible.

What is the correct type brake fluid to use in my car?

I'm about to add fluid and bleed the brake system but I want to make sure I'm using the correct type fluid.

[Plymouthy Adams]

DOT 3 

(given it has not been upgrade to DOT 5 by a PO) 

 

Edited May 30, 2017 by Plymouthy Adams

[Don Coatney]

Very important to not mix the two (Dot3, Dot5) as they are not compatible.

[mikeintx]

Thanks guys!

Is there any way to tell whether or not mine has been "upgraded" to DOT 5??? 

[Plymouthy Adams]

1. withdraw some fluid from the master cylinder and place in a glass container
2. add some clean water to the fluid. (equal parts)
3. Put the lid on the container and shake it till well blended..
4. Let it settle for about 10 minutes.
5. If the water and the fluid do not separate but stays a off color mixture then you have regular auto brake fluid.
6. If the water and the fluid do not mixed, and show signs of layering or seperate globs then the fluid is Silicone.

Edited May 30, 2017 by Plymouthy Adams
spelling

[TodFitch]

41 minutes ago, Plymouthy Adams said:

1. withdraw some fluid from the master cylinder and place in a glass container
2. add some clean water to the fluid. (equal parts)
3. Put the lid on the container and shake it till well blended..
4. Let it settle for about 10 minutes.
5. If the water and the fluid do not separate but stays a off color mixture then you have regular auto brake fluid.
6. If the water and the fluid do not mixed, and show signs of layering or seperate globs then the fluid is Silicone.

Also, DOT 3 ("regular") brake fluid is a pretty good paint remover while DOT5 is not. They smell different too but I've no way to describe that in a way that would be useful.