So my rex manual calls for dot 3 brake fluid... the stainless steel replacement lines I ordered specifically for 88 to 91 CRX says to use dot 4. Being a complete noob at mechanical stuff, does anyone have a suggestion on which to use? Is there even really a difference?

 

**** ya there is..if it was me id flush the master cylinder before installing the lines BECAUSE THE TWO DNT MIX RIGHT,but if ur not racing on the track leave it

 

So basically, as long as I flush out the system... dot4 will work just fine in my rex?

 

Dot 3 and dot 4 are interchangeable/mixable in cars requiring dot 3 fluid, but if the new lines say to use dot 4, I'd use dot 4.

 

Sounds good, thanks for the help.

 

Exactly!

Actually my MC says on top use DOT3 or DOT4, DOT4 is better but a little more $$

 

Just don't use dot 5, unless its 5.1 which is compatible.