portion

hello i want to replace some of my old brake fluid with new fluid and i want to know if brake fluids can mix?
in the car right now i have GUNK dot 3 heavy duty brake fluid.
i bought valvoline dot 3 & dot 4 brake fluid

http://www.valvoline.com/pages/produ...asp?product=51

the valvoline is synthetic and the gunk dot 3 is not synthetic
can i mix the fluids?
or do i have to flush out the brake system and replace the fluid with the new?

the valvoline does say it is compatible with conventional brake fluids soo
wat do you guys think? can i mix them
thx

2fast4y0u

i would flush to make sure its all good....i think its really up to u

portion

yea i know thats the best way
but i am a newbie kind off
first car so i jes want to things simple

i dont know how to flush the system and bleed etc thats y i want to replace fluid instead. less hassle

do u think i can mix them?
i am jes goin to empty the master cylinder and refill it with the new
and let a week pass and do it again

2fast4y0u

you can take it to a brake shop and they can do what they call power bleeding... they hook it up to a vaccumm type system and suck all the old fluid out and put new in at the same time....thats what i suggest doing. i wouldnt empty whats in the master for the fact of air bubles in the lines(thats not a good thing!!!). if yopu try and bleed the system by you self its a big pain in the ***. you legs get tired from pumping the brake and it just sucks all together.

portion

damm kool
thought i couldve just replaced some fluid
how much u think those stupid shops well charge?

2fast4y0u

shouldnt be much is there a midas or something like that around you. or like a mineki

portion

yea well i live in miami
so we have midas jippy lube pepboys etc

2fast4y0u

call one of them and find out how much it would be to power bleed your brake system and add you own fluid instaed of theres

you should be good after that