Dot.4 Fluid in Dot.3?
 

I have a 2012 Mazda 3, 6 speed... The owner manual says to use Dot.3.....I was wondering if it would matter if I used Motul Dot. 4..

DOT-4 and DOT-5 are compatible.

Ok, thank you for your reply.....

Don't use dot 5 or 5.1.

Stick with either DOT3 or DOT4.

Dot 4 it is,,,thanks for your reply..

What does it say on the top of the cap to the reservoir ?

It says poke-a-dot...

DOT3 and DOT 4 cannot be mixed with DOT5 fluid. They are incompatible and if mixed, brake failure may occur. Moreover, there are serious compatibility issues when using DOT5 in a system that was engineered to use DOT3 or DOT4. Also, users should take care not to mix DOT3 and DOT4 fluids as there may be brake system compatibility issues. Always consult your owners manual and use the type of fluid specified for your vehicle

Not sure where you are getting your information, but DOT3 and DOT4 are 100% compatible.

RE-READ the info provided.. never did it say dot 3 & 4 are NOT compatible . It says they are NOT compatible with 5.. thats always been a “thing” for years now.. especially in the motorcycle world