Did you check your owners manual for the correct type?
And true, Thou shalt not mix types of brake fluid. Just as you should not mix types and viscosity of oils and there are correct anti-freeze's to use for different applications.

 

Did you check your owners manual for the correct type?
And true, Thou shalt not mix types of brake fluid. Just as you should not mix types and viscosity of oils and there are correct anti-freeze's to use for different applications.

What happens if I mix types or viscosity of oil?

 

Hi,
I,m after a bit of advice for my 2003 Jeep Liberty KJ.
What is the correct brake fluid I should be using? I ask this because years ago someone told me if you use the wrong brake fluid and in mixes with the correct fluid it damages all the seals in the brake system.
Anyone any thoughts on this?
Thanks in anticipation.
Bucknobs.

Dot 3. Only newer European cars (like Mercedes, or bmw, possibly even Volvo) have upgraded to dot 4. Dot 3 is what's in your jeep. You'll find it literally everywhere.

Don't over think it, if dot 4 was introduced to your system that is mostly dot 3, it'd be on par with adding dex 3 to a trans that's running dex 2. Nothing bad will happen, its just an upgraded fluid with a higher boiling point.

 

Did a little searching on this. Seems to be the general consensus that mixing will not hurt anything,,,within reason. There seem to be others saying not to mix but they don't seem as qualified as Mobil. (same with me).
To the OP, or anyone else who reads this looking for info, I apologize if I gave out bad info.

 

Use DOT 3 brake fluid. And always use fresh unopened brake fluid, brake fluid in a previously opened container will have absorbed moisture from the air.

There is absolutely no problem mixing engine oil or gear lube viscosities, and there is no problem even mixing synthetic and conventional lubricants either... they are 100% fully compatible. For example... if you mixed a quart of Castrol synthetic 10W-40 with a quart of Valvoline 5W-30 you'd end up with two quarts of 7.5W-35 Castroline Blend.