[Guest]

Is it OK to top up Hydraulic fluids when you don't know which type is in there to start with?( of course not being stupid enough to use AYC fluid for Brake fluid?!)
....
only i was folowing the thread on dry and wet braking fluid the other day and and it got 'complex'.......but i did understand what they were talking about in a magazine article after reading the thread!

Colie

 

[Guest]

If yr talking brake fluid then yes it's ok 2 (but not ideal) 2 mix fluids , EXCEPT , 4 silicone fluid. This must only b topped up with silicone. However , silicone fluid is not the best 2 use in a performance car.

 

[Guest]

If you don't know what brake fluid is being used then rather than top it up I would flush and replace the whole lot through with new fluid (it should be done every 6 to 12 months on an Evo anyway). You are only talking about £10-£20 and a bit of time if you do it yourself.
I have never had to top mine up (expect after bleeding and a test run), if it's getting really low then check the pad/disc wear as that and a leak should be the only thing that will alter the level. Remember if you fit new discs/pads then it will overflow if you have previously topped up the reservoir so be careful!
If you do want to top up then all DOT 3, 4 and 5.1 fluids should be compatiable but read the label on the fluid container, it should tell whether there is a compatiability problem.
Never use a mineral based fluid (Castrol LHM for example), you will wreck the system!

 

[Guest]

Evoboy sneaked in first again

Yeah definitely don't use Silcone based fluids (DOT 5), they are good for longevity (well even thats debateable) but crap for performance, designed for Micra owners .

 

[Guest]

Thanks Guys..