Brake Fluid Type

TMcWeed 59 · Feb 11, 2023

We have a 2018 RAM 3500 1 Ton Laramie 4x4 crew cab with the 6.7L Diesel. We're doing the front brakes right now, rotors,calipers,pads .I bought DOT 3 brake fluid at a local parts store (their brand) it says it exceeds Canadian CMVSS116, SAE J 1703and ISO 4925 standards with a minimum wet boiling point of 284 degrees F. It doesn't specify synthetic on the jug that I could find but will this be fine to use in my truck? Thanks to all who reply.

Gordo2212 · Feb 11, 2023

Any DOT 3 brake fluid will work fine.

Nicholas Cove · Feb 11, 2023

Dot 3 will work. Dot 4 will work Dot 5 WILL NOT work and Dot 5.1 will work.

Jeepwalker · Feb 11, 2023

Dot 3, 4 & 5.1 are all technically synthetic. Some mfgrs put 'synthetic' on the label while others don't, which is really confusing.

Silicone brake fluid is another thing. That's another conversation, don't use on your truck or mix with regular brake fluid. Stick with what's recommended.

Burla · Feb 11, 2023

Dot 4 is interchangeable with dot 3 and is far better in the cold and hot. For a 3500 I have zero idea why they would spec dot 3 especially with the possibility of towing. 5.1 would probably be overkill but is the other option, take the dot 3 back and get dot 4, they are mixable as well. Yes never use dot 5 it is incompatible.

Burla · Feb 11, 2023

read here.

While you can use DOT3 instead of DOT4 brake fluid, this is not recommended. Both these fluids are glycol-based, meaning no damage to brake-system components will be done by switching between them.
But the DOT3 brake fluid, however, has a lower boiling point than its DOT4 counterpart, which may be an issue in heavy-duty applications, such as towing or driving on steep hills. As a general rule, you should always use brake fluid with the specification that matches the one your car came from the factory with.

Socalramfan · Feb 11, 2023

Be careful when connecting the Dots

Brake Fluid Type

TMcWeed 59

Junior Member

Gordo2212

Senior Member

Nicholas Cove

Senior Member

Jeepwalker

Senior Member

Burla

Senior Member

Burla

Senior Member

Socalramfan

Senior Member

Similar threads

Latest posts

Members online

Forum statistics

Share this page