Brake Fluid Compatibility

[four winns 214]

I just overhauled the brakes on the trailer for my 1984 Sea Ray cuddy. I used synthetic DOT 3 to refill. I also have a 2002 Four Winns trailer and I am unsure whether it has synthetic or regular DOT 3 fluid. I looked on the label of the synthetic DOT 3 fluid and did not see any restrictions about mixing it with regular DOT 3. Anybody know whether the two can be safely mixed?

 

[bruceb58]

Re: Brake Fluid Compatibility

Yes they can. My Valvoline synthetic brake fluid states this right on the front of the bottle.

If you re did your brakes, I would just flush out all the old anyway. I change mine out every couple years.

 

[kenmyfam]

Re: Brake Fluid Compatibility

Agree with Bruce, bleed it out and replace.

 

[tawood]

Re: Brake Fluid Compatibility

You can even up it to synthetic dot 4 without harm. Dot 4 is just a better boil level. Again, I agree with the others, I would bleed it all and replace though.

 

[four winns 214]

Re: Brake Fluid Compatibility

Thanks guys. The Sea Ray brake re-do was a complete fluid replacement. The reason I posed the question is that I'm going to keep a bottle of brake fluid in my "tow box" just in case. And when it comes time for the Four Winns trailer brakes, I will replace its fluid, too.